[ { "__docId__": 0, "kind": "file", "name": "src/Agent.js", "content": "/** \r\n * Agent is the central class for beat tracking\r\n * @class\r\n */\r\nexport default class Agent {\r\n /**\r\n * Constructor\r\n * @param {Number} tempo - tempo hypothesis of the Agent\r\n * @param {Number} firstBeatTime - the time of the first beat accepted by this Agent\r\n * @param {Number} firsteventScore - salience value of the first beat accepted by this Agent\r\n * @param {Array} agentList - reference to the agent list \r\n * @param {Object} [params={}] - parameters \r\n * @param {Number} [params.expiryTime=10] - the time after which an Agent that has not accepted any beat will be destroyed\r\n * @param {Number} [params.toleranceWndInner=0.04] - the maximum time that a beat can deviate from the predicted beat time without a fork occurring\r\n * @param {Number} [params.toleranceWndPre=0.15] - the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.toleranceWndPost=0.3] - the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.correctionFactor=50] - correction factor for updating beat period\r\n * @param {Number} [params.maxChange=0.2] - the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period\r\n * @param {Number} [params.penaltyFactor=0.5] - factor for correcting score, if onset do not coincide precisely with predicted beat time\r\n */ \r\n constructor(tempo, firstBeatTime, firsteventScore, agentList, params = {}) {\r\n /** \r\n * the time after which an Agent that has not accepted any beat will be destroyed\r\n * @type {Number} \r\n */\r\n this.expiryTime = params.expiryTime || 10;\r\n /** \r\n * the maximum time that a beat can deviate from the predicted beat time without a fork occurring\r\n * @type {Number} \r\n */\r\n this.toleranceWndInner = params.toleranceWndInner || 0.04;\r\n /** \r\n * the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period\r\n * @type {Number} \r\n */\r\n this.toleranceWndPre = params.toleranceWndPre || 0.15;\r\n /** \r\n * the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period\r\n * @type {Number} \r\n */\r\n this.toleranceWndPost = params.toleranceWndPost || 0.3;\r\n\r\n this.toleranceWndPre *= tempo;\r\n this.toleranceWndPost *= tempo;\r\n\r\n /** \r\n * correction factor for updating beat period\r\n * @type {Number} \r\n */\r\n this.correctionFactor = params.correctionFactor || 50;\r\n /** \r\n * the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period\r\n * @type {Number} \r\n */ \r\n this.maxChange = params.maxChange || 0.2;\r\n /** \r\n * factor for correcting score, if onset do not coincide precisely with predicted beat time\r\n * @type {Number} \r\n */ \r\n this.penaltyFactor = params.penaltyFactor || 0.5;\r\n\r\n /** \r\n * the current tempo hypothesis of the Agent, expressed as the beat period\r\n * @type {Number} \r\n */ \r\n this.beatInterval = tempo;\r\n /** \r\n * the initial tempo hypothesis of the Agent, expressed as the beat period\r\n * @type {Number}\r\n */ \r\n this.initialBeatInterval = tempo;\r\n /** \r\n * the time of the most recent beat accepted by this Agent\r\n * @type {Number} \r\n */ \r\n this.beatTime = firstBeatTime;\r\n /** \r\n * the number of beats found by this Agent, including interpolated beats\r\n * @type {Number} \r\n */ \r\n this.totalBeatCount = 1;\r\n /** \r\n * the array of onsets accepted by this Agent as beats, plus interpolated beats\r\n * @type {Array} \r\n */ \r\n this.events = [firstBeatTime];\r\n /** \r\n * sum of salience values of the onsets which have been interpreted as beats by this Agent\r\n * @type {Number} \r\n */ \r\n this.score = firsteventScore;\r\n /** \r\n * reference to the agent list \r\n * @type {Array} \r\n */ \r\n this.agentListRef = agentList;\r\n }\r\n /**\r\n * The event time is tested if it is a beat time\r\n * @param {Number} eventTime - the event time to be tested\r\n * @param {Number} eventScore - salience values of the event time\r\n * @return {Boolean} indicate whether the given event time was accepted as a beat time\r\n */\r\n considerEvent(eventTime, eventScore) {\r\n if (eventTime - this.events[this.events.length - 1] > this.expiryTime) {\r\n this.score = -1;\r\n return false;\r\n }\r\n\r\n let beatCount = Math.round( (eventTime - this.beatTime) / this.beatInterval );\r\n let err = eventTime - this.beatTime - beatCount * this.beatInterval;\r\n\r\n if (beatCount > 0 && err >= -this.toleranceWndPre && err <= this.toleranceWndPost) {\r\n if (Math.abs(err) > this.toleranceWndInner) {\r\n this.agentListRef.push(this.clone());\r\n }\r\n this.acceptEvent(eventTime, eventScore, err, beatCount);\r\n return true;\r\n }\r\n return false;\r\n }\r\n /**\r\n * Accept the event time as a beat time, and update the state of the Agent accordingly\r\n * @param {Number} eventTime - the event time to be accepted\r\n * @param {Number} eventScore - salience values of the event time\r\n * @param {Number} err - the difference between the predicted and actual beat times\r\n * @param {Number} beatCount - the number of beats since the last beat\r\n */ \r\n acceptEvent(eventTime, eventScore, err, beatCount) {\r\n this.beatTime = eventTime;\r\n this.events.push(eventTime);\r\n\r\n let corrErr = err / this.correctionFactor;\r\n if (Math.abs(this.initialBeatInterval - this.beatInterval - corrErr) < this.maxChange * this.initialBeatInterval) {\r\n this.beatInterval += corrErr;\r\n }\r\n this.totalBeatCount += beatCount;\r\n let errFactor = err > 0 ? err / this.toleranceWndPost : err / -this.toleranceWndPre;\r\n let scoreFactor = 1 - this.penaltyFactor * errFactor;\r\n this.score += eventScore * scoreFactor;\r\n }\r\n /**\r\n * Interpolates missing beats in the Agent's beat track\r\n */ \r\n fillBeats() {\r\n let prevBeat, nextBeat, currentInterval, beats;\r\n prevBeat = 0;\r\n if (this.events.length > 2) {\r\n prevBeat = this.events[0];\r\n }\r\n\r\n for (let i = 0; i < this.events.length; i++) {\r\n nextBeat = this.events[i];\r\n beats = Math.round((nextBeat - prevBeat) / this.beatInterval - 0.01);\r\n currentInterval = (nextBeat - prevBeat) / beats;\r\n let k = 0;\r\n for ( ; beats > 1; beats--) {\r\n prevBeat += currentInterval;\r\n this.events.splice(i + k, 0, prevBeat);\r\n k++;\r\n }\r\n prevBeat = nextBeat; \r\n }\r\n }\r\n /**\r\n * Makes a clone of the Agent\r\n * @return {Agent} agent's clone\r\n */ \r\n clone() {\r\n let newAgent = new Agent();\r\n newAgent.beatInterval = this.beatInterval;\r\n newAgent.initialBeatInterval = this.initialBeatInterval;\r\n newAgent.beatTime = this.beatTime;\r\n newAgent.totalBeatCount = this.totalBeatCount;\r\n newAgent.events = this.events.slice();\r\n newAgent.expiryTime = this.expiryTime;\r\n newAgent.toleranceWndInner = this.toleranceWndInner;\r\n newAgent.toleranceWndPre = this.toleranceWndPre;\r\n newAgent.toleranceWndPost = this.toleranceWndPost;\r\n newAgent.correctionFactor = this.correctionFactor;\r\n newAgent.maxChange = this.maxChange;\r\n newAgent.penaltyFactor = this.penaltyFactor;\r\n newAgent.score = this.score;\r\n newAgent.agentListRef = this.agentListRef;\r\n\r\n return newAgent;\r\n }\r\n}", "static": true, "longname": "src/Agent.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 1, "kind": "class", "name": "Agent", "memberof": "src/Agent.js", "static": true, "longname": "src/Agent.js~Agent", "access": null, "export": true, "importPath": "music-tempo/src/Agent.js", "importStyle": "Agent", "description": "Agent is the central class for beat tracking", "lineNumber": 5, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 2, "kind": "constructor", "name": "constructor", "memberof": "src/Agent.js~Agent", "generator": false, "async": false, "static": false, "longname": "src/Agent.js~Agent#constructor", "access": null, "description": "Constructor", "lineNumber": 21, "params": [ { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "tempo", "description": "tempo hypothesis of the Agent" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "firstBeatTime", "description": "the time of the first beat accepted by this Agent" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "firsteventScore", "description": "salience value of the first beat accepted by this Agent" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "agentList", "description": "reference to the agent list" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "10", "defaultRaw": 10, "name": "params.expiryTime", "description": "the time after which an Agent that has not accepted any beat will be destroyed" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.04", "defaultRaw": 0.04, "name": "params.toleranceWndInner", "description": "the maximum time that a beat can deviate from the predicted beat time without a fork occurring" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.15", "defaultRaw": 0.15, "name": "params.toleranceWndPre", "description": "the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.3", "defaultRaw": 0.3, "name": "params.toleranceWndPost", "description": "the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "50", "defaultRaw": 50, "name": "params.correctionFactor", "description": "correction factor for updating beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.2", "defaultRaw": 0.2, "name": "params.maxChange", "description": "the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.5", "defaultRaw": 0.5, "name": "params.penaltyFactor", "description": "factor for correcting score, if onset do not coincide precisely with predicted beat time" } ] }, { "__docId__": 3, "kind": "member", "name": "expiryTime", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#expiryTime", "access": null, "description": "the time after which an Agent that has not accepted any beat will be destroyed", "lineNumber": 26, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 4, "kind": "member", "name": "toleranceWndInner", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#toleranceWndInner", "access": null, "description": "the maximum time that a beat can deviate from the predicted beat time without a fork occurring", "lineNumber": 31, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 5, "kind": "member", "name": "toleranceWndPre", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#toleranceWndPre", "access": null, "description": "the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period", "lineNumber": 36, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 6, "kind": "member", "name": "toleranceWndPost", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#toleranceWndPost", "access": null, "description": "the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period", "lineNumber": 41, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 7, "kind": "member", "name": "toleranceWndPre", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#toleranceWndPre", "access": null, "description": null, "lineNumber": 43, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 8, "kind": "member", "name": "toleranceWndPost", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#toleranceWndPost", "access": null, "description": null, "lineNumber": 44, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 9, "kind": "member", "name": "correctionFactor", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#correctionFactor", "access": null, "description": "correction factor for updating beat period", "lineNumber": 50, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 10, "kind": "member", "name": "maxChange", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#maxChange", "access": null, "description": "the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period", "lineNumber": 55, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 11, "kind": "member", "name": "penaltyFactor", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#penaltyFactor", "access": null, "description": "factor for correcting score, if onset do not coincide precisely with predicted beat time", "lineNumber": 60, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 12, "kind": "member", "name": "beatInterval", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#beatInterval", "access": null, "description": "the current tempo hypothesis of the Agent, expressed as the beat period", "lineNumber": 66, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 13, "kind": "member", "name": "initialBeatInterval", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#initialBeatInterval", "access": null, "description": "the initial tempo hypothesis of the Agent, expressed as the beat period", "lineNumber": 71, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 14, "kind": "member", "name": "beatTime", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#beatTime", "access": null, "description": "the time of the most recent beat accepted by this Agent", "lineNumber": 76, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 15, "kind": "member", "name": "totalBeatCount", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#totalBeatCount", "access": null, "description": "the number of beats found by this Agent, including interpolated beats", "lineNumber": 81, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 16, "kind": "member", "name": "events", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#events", "access": null, "description": "the array of onsets accepted by this Agent as beats, plus interpolated beats", "lineNumber": 86, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 17, "kind": "member", "name": "score", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#score", "access": null, "description": "sum of salience values of the onsets which have been interpreted as beats by this Agent", "lineNumber": 91, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 18, "kind": "member", "name": "agentListRef", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#agentListRef", "access": null, "description": "reference to the agent list ", "lineNumber": 96, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 19, "kind": "method", "name": "considerEvent", "memberof": "src/Agent.js~Agent", "generator": false, "async": false, "static": false, "longname": "src/Agent.js~Agent#considerEvent", "access": null, "description": "The event time is tested if it is a beat time", "lineNumber": 104, "params": [ { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "eventTime", "description": "the event time to be tested" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "eventScore", "description": "salience values of the event time" } ], "return": { "nullable": null, "types": [ "Boolean" ], "spread": false, "description": "indicate whether the given event time was accepted as a beat time" } }, { "__docId__": 20, "kind": "member", "name": "score", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#score", "access": null, "description": null, "lineNumber": 106, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 21, "kind": "method", "name": "acceptEvent", "memberof": "src/Agent.js~Agent", "generator": false, "async": false, "static": false, "longname": "src/Agent.js~Agent#acceptEvent", "access": null, "description": "Accept the event time as a beat time, and update the state of the Agent accordingly", "lineNumber": 129, "params": [ { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "eventTime", "description": "the event time to be accepted" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "eventScore", "description": "salience values of the event time" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "err", "description": "the difference between the predicted and actual beat times" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "beatCount", "description": "the number of beats since the last beat" } ] }, { "__docId__": 22, "kind": "member", "name": "beatTime", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#beatTime", "access": null, "description": null, "lineNumber": 130, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 23, "kind": "member", "name": "beatInterval", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#beatInterval", "access": null, "description": null, "lineNumber": 135, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 24, "kind": "member", "name": "totalBeatCount", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#totalBeatCount", "access": null, "description": null, "lineNumber": 137, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 25, "kind": "member", "name": "score", "memberof": "src/Agent.js~Agent", "static": false, "longname": "src/Agent.js~Agent#score", "access": null, "description": null, "lineNumber": 140, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 26, "kind": "method", "name": "fillBeats", "memberof": "src/Agent.js~Agent", "generator": false, "async": false, "static": false, "longname": "src/Agent.js~Agent#fillBeats", "access": null, "description": "Interpolates missing beats in the Agent's beat track", "lineNumber": 145, "params": [] }, { "__docId__": 27, "kind": "method", "name": "clone", "memberof": "src/Agent.js~Agent", "generator": false, "async": false, "static": false, "longname": "src/Agent.js~Agent#clone", "access": null, "description": "Makes a clone of the Agent", "lineNumber": 169, "params": [], "return": { "nullable": null, "types": [ "Agent" ], "spread": false, "description": "agent's clone" } }, { "__docId__": 28, "kind": "file", "name": "src/BeatTracking.js", "content": "import Agent from \"./Agent\";\r\n/** \r\n * Performs automatic beat tracking\r\n * @class\r\n */\r\nexport default class BeatTracking {\r\n /**\r\n * Perform beat tracking on a array of onsets\r\n * @param {Array} events - the array of onsets to beat track\r\n * @param {Array} eventsScores - the array of corresponding salience values\r\n * @param {Array} tempoList - the array of tempo hypothesis \r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.initPeriod=5] - duration of the initial section\r\n * @param {Number} [params.thresholdBI=0.02] - for the purpose of removing duplicate agents, the default JND of IBI\r\n * @param {Number} [params.thresholdBT=0.04] - for the purpose of removing duplicate agents, the default JND of phase\r\n * @param {Number} [params.expiryTime=10] - the time after which an Agent that has not accepted any beat will be destroyed\r\n * @param {Number} [params.toleranceWndInner=0.04] - the maximum time that a beat can deviate from the predicted beat time without a fork occurring\r\n * @param {Number} [params.toleranceWndPre=0.15] - the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.toleranceWndPost=0.3] - the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.correctionFactor=50] - correction factor for updating beat period\r\n * @param {Number} [params.maxChange=0.2] - the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period\r\n * @param {Number} [params.penaltyFactor=0.5] - factor for correcting score, if onset do not coincide precisely with predicted beat time\r\n * @return {Array} agents - agents array\r\n */\r\n static trackBeat(events, eventsScores, tempoList, params = {}) {\r\n const initPeriod = params.initPeriod || 5,\r\n thresholdBI = params.thresholdBI || 0.02,\r\n thresholdBT = params.thresholdBT || 0.04;\r\n function removeSimilarAgents() {\r\n agents.sort( (a1, a2) => a1.beatInterval - a2.beatInterval );\r\n const length = agents.length;\r\n for (let i = 0; i < length; i++) {\r\n if (agents[i].score < 0) continue;\r\n for (let j = i + 1; j < length; j++) {\r\n if(agents[j].beatInterval - agents[i].beatInterval > thresholdBI) {\r\n break;\r\n }\r\n if(Math.abs(agents[j].beatTime - agents[i].beatTime) > thresholdBT) {\r\n continue;\r\n }\r\n if(agents[i].score < agents[j].score) {\r\n agents[i].score = -1;\r\n }\r\n else {\r\n agents[j].score = -1;\r\n }\r\n }\r\n }\r\n for (let i = length - 1; i >= 0; i--) {\r\n if (agents[i].score < 0) {\r\n agents.splice(i, 1);\r\n }\r\n }\r\n } \r\n var agents = [];\r\n\r\n for (let i = 0; i < tempoList.length; i++) {\r\n agents.push(new Agent(tempoList[i], events[0], eventsScores[0], agents, params));\r\n }\r\n var j = 1;\r\n removeSimilarAgents();\r\n\r\n while (events[j] < initPeriod) {\r\n let agentsLength = agents.length;\r\n let prevBeatInterval = -1;\r\n let isEventAccepted = true;\r\n for (let k = 0; k < agentsLength; k++) {\r\n if (agents[k].beatInterval != prevBeatInterval) {\r\n if (!isEventAccepted) {\r\n agents.push(new Agent(prevBeatInterval, events[j], eventsScores[j], agents, params));\r\n }\r\n prevBeatInterval = agents[k].beatInterval;\r\n isEventAccepted = false;\r\n }\r\n isEventAccepted = agents[k].considerEvent(events[j], eventsScores[j]) || isEventAccepted; \r\n }\r\n removeSimilarAgents();\r\n j++;\r\n }\r\n const eventsLength = events.length;\r\n for (let i = j; i < eventsLength; i++) {\r\n let agentsLength = agents.length;\r\n for (let j = 0; j < agentsLength; j++) {\r\n agents[j].considerEvent(events[i], eventsScores[i]);\r\n }\r\n removeSimilarAgents();\r\n }\r\n\r\n return agents;\r\n }\r\n}", "static": true, "longname": "src/BeatTracking.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 29, "kind": "class", "name": "BeatTracking", "memberof": "src/BeatTracking.js", "static": true, "longname": "src/BeatTracking.js~BeatTracking", "access": null, "export": true, "importPath": "music-tempo/src/BeatTracking.js", "importStyle": "BeatTracking", "description": "Performs automatic beat tracking", "lineNumber": 6, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 30, "kind": "method", "name": "trackBeat", "memberof": "src/BeatTracking.js~BeatTracking", "generator": false, "async": false, "static": true, "longname": "src/BeatTracking.js~BeatTracking.trackBeat", "access": null, "description": "Perform beat tracking on a array of onsets", "lineNumber": 25, "params": [ { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "events", "description": "the array of onsets to beat track" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "eventsScores", "description": "the array of corresponding salience values" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "tempoList", "description": "the array of tempo hypothesis" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "5", "defaultRaw": 5, "name": "params.initPeriod", "description": "duration of the initial section" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.02", "defaultRaw": 0.02, "name": "params.thresholdBI", "description": "for the purpose of removing duplicate agents, the default JND of IBI" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.04", "defaultRaw": 0.04, "name": "params.thresholdBT", "description": "for the purpose of removing duplicate agents, the default JND of phase" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "10", "defaultRaw": 10, "name": "params.expiryTime", "description": "the time after which an Agent that has not accepted any beat will be destroyed" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.04", "defaultRaw": 0.04, "name": "params.toleranceWndInner", "description": "the maximum time that a beat can deviate from the predicted beat time without a fork occurring" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.15", "defaultRaw": 0.15, "name": "params.toleranceWndPre", "description": "the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.3", "defaultRaw": 0.3, "name": "params.toleranceWndPost", "description": "the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "50", "defaultRaw": 50, "name": "params.correctionFactor", "description": "correction factor for updating beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.2", "defaultRaw": 0.2, "name": "params.maxChange", "description": "the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.5", "defaultRaw": 0.5, "name": "params.penaltyFactor", "description": "factor for correcting score, if onset do not coincide precisely with predicted beat time" } ], "return": { "nullable": null, "types": [ "Array" ], "spread": false, "description": "agents - agents array" } }, { "__docId__": 31, "kind": "file", "name": "src/FFT.js", "content": "/** \r\n * Class containing methods for Fast Fourier Transform\r\n * @class\r\n */\r\nexport default class FFT {\r\n /**\r\n * Get Hamming window\r\n * @param {Number} bufferSize - windows size\r\n * @return {Array} wnd - Hamming window\r\n */ \r\n static getHammingWindow(bufferSize) {\r\n const a = 25 / 46;\r\n const b = 21 / 46;\r\n const scale = 1 / bufferSize / 0.54; \r\n const sqrtBufferSize = Math.sqrt(bufferSize);\r\n const factor = (Math.PI * 2) / bufferSize;\r\n let wnd = [];\r\n for (let i = 0; i < bufferSize; i++) {\r\n wnd[i] = sqrtBufferSize * (scale * (a - b * Math.cos(factor * i))) ;\r\n }\r\n return wnd;\r\n }\r\n /**\r\n * Computes FFT and converts the results to magnitude representation\r\n * @param {Array} re - the real part of the input data and the magnitude of the output data\r\n * @param {Array} im - the imaginary part of the input data\r\n */\r\n static getSpectrum(re, im) {\r\n const direction = -1;\r\n const n = re.length;\r\n const bits = Math.round(Math.log(n) / Math.log(2));\r\n const twoPI = Math.PI * 2;\r\n if (n != (1 << bits))\r\n throw new Error(\"FFT data must be power of 2\");\r\n let localN;\r\n let j = 0; \r\n for (let i = 0; i < n-1; i++) {\r\n if (i < j) {\r\n let temp = re[j];\r\n re[j] = re[i];\r\n re[i] = temp;\r\n temp = im[j];\r\n im[j] = im[i];\r\n im[i] = temp;\r\n }\r\n let k = n / 2;\r\n while ((k >= 1) && (k - 1 < j)) {\r\n j = j - k;\r\n k = k / 2;\r\n }\r\n j = j + k;\r\n }\r\n for(let m = 1; m <= bits; m++) {\r\n localN = 1 << m;\r\n let Wjk_r = 1;\r\n let Wjk_i = 0;\r\n let theta = twoPI / localN;\r\n let Wj_r = Math.cos(theta);\r\n let Wj_i = direction * Math.sin(theta);\r\n let nby2 = localN / 2;\r\n for (j = 0; j < nby2; j++) {\r\n for (let k = j; k < n; k += localN) {\r\n let id = k + nby2;\r\n let tempr = Wjk_r * re[id] - Wjk_i * im[id];\r\n let tempi = Wjk_r * im[id] + Wjk_i * re[id];\r\n re[id] = re[k] - tempr;\r\n im[id] = im[k] - tempi;\r\n re[k] += tempr;\r\n im[k] += tempi;\r\n }\r\n let wtemp = Wjk_r;\r\n Wjk_r = Wj_r * Wjk_r - Wj_i * Wjk_i;\r\n Wjk_i = Wj_r * Wjk_i + Wj_i * wtemp;\r\n }\r\n }\r\n\r\n for (let i = 0; i < re.length; i++) {\r\n let pow = re[i] * re[i] + im[i] * im[i];\r\n //im[i] = Math.atan2(im[i], re[i]);\r\n re[i] = pow;\r\n }\r\n\r\n for (let i = 0; i < re.length; i++)\r\n re[i] = Math.sqrt(re[i]);\r\n\r\n }\r\n}", "static": true, "longname": "src/FFT.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 32, "kind": "class", "name": "FFT", "memberof": "src/FFT.js", "static": true, "longname": "src/FFT.js~FFT", "access": null, "export": true, "importPath": "music-tempo/src/FFT.js", "importStyle": "FFT", "description": "Class containing methods for Fast Fourier Transform", "lineNumber": 5, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 33, "kind": "method", "name": "getHammingWindow", "memberof": "src/FFT.js~FFT", "generator": false, "async": false, "static": true, "longname": "src/FFT.js~FFT.getHammingWindow", "access": null, "description": "Get Hamming window", "lineNumber": 11, "params": [ { "nullable": null, "types": [ "Number" ], "spread": false, "optional": false, "name": "bufferSize", "description": "windows size" } ], "return": { "nullable": null, "types": [ "Array" ], "spread": false, "description": "wnd - Hamming window" } }, { "__docId__": 34, "kind": "method", "name": "getSpectrum", "memberof": "src/FFT.js~FFT", "generator": false, "async": false, "static": true, "longname": "src/FFT.js~FFT.getSpectrum", "access": null, "description": "Computes FFT and converts the results to magnitude representation", "lineNumber": 28, "params": [ { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "re", "description": "the real part of the input data and the magnitude of the output data" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "im", "description": "the imaginary part of the input data" } ] }, { "__docId__": 35, "kind": "file", "name": "src/MusicTempo.js", "content": "import OnsetDetection from \"./OnsetDetection\";\r\nimport TempoInduction from \"./TempoInduction\";\r\nimport BeatTracking from \"./BeatTracking\";\r\nimport FFT from \"./FFT\";\r\n\r\n/** \r\n * Class combines the work of all the steps of tempo extraction\r\n * @class\r\n */\r\nexport default class MusicTempo {\r\n /**\r\n * Constructor\r\n * @param {Float32Array} audioData - non-interleaved IEEE 32-bit linear PCM with a nominal range of -1 -> +1 (Web Audio API - Audio Buffer)\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.bufferSize=2048] - FFT windows size\r\n * @param {Number} [params.hopSize=441] - spacing of audio frames in samples\r\n * @param {Number} [params.decayRate=0.84] - how quickly previous peaks are forgotten\r\n * @param {Number} [params.peakFindingWindow=6] - minimum distance between peaks\r\n * @param {Number} [params.meanWndMultiplier=3] - multiplier for peak finding window\r\n * @param {Number} [params.peakThreshold=0.35] - minimum value of peaks\r\n * @param {Number} [params.widthTreshold=0.025] - the maximum difference in IOIs which are in the same cluster\r\n * @param {Number} [params.maxIOI=2.5] - the maximum IOI for inclusion in a cluster\r\n * @param {Number} [params.minIOI=0.07] - the minimum IOI for inclusion in a cluster\r\n * @param {Number} [params.maxTempos=10] - initial amount of tempo hypotheses\r\n * @param {Number} [params.minBeatInterval=0.3] - the minimum inter-beat interval (IBI) (0.30 seconds == 200 BPM)\r\n * @param {Number} [params.maxBeatInterval=1] - the maximum inter-beat interval (IBI) (1.00 seconds == 60 BPM)\r\n * @param {Number} [params.initPeriod=5] - duration of the initial section\r\n * @param {Number} [params.thresholdBI=0.02] - for the purpose of removing duplicate agents, the default JND of IBI\r\n * @param {Number} [params.thresholdBT=0.04] - for the purpose of removing duplicate agents, the default JND of phase\r\n * @param {Number} [params.expiryTime=10] - the time after which an Agent that has not accepted any beat will be destroyed\r\n * @param {Number} [params.toleranceWndInner=0.04] - the maximum time that a beat can deviate from the predicted beat time without a fork occurring\r\n * @param {Number} [params.toleranceWndPre=0.15] - the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.toleranceWndPost=0.3] - the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period\r\n * @param {Number} [params.correctionFactor=50] - correction factor for updating beat period\r\n * @param {Number} [params.maxChange=0.2] - the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period\r\n * @param {Number} [params.penaltyFactor=0.5] - factor for correcting score, if onset do not coincide precisely with predicted beat time\r\n */ \r\n constructor(audioData, params = {}) {\r\n if ( !(audioData instanceof Float32Array) && !Array.isArray(audioData)) {\r\n throw \"audioData is not an array\";\r\n }\r\n const timeStep = params.timeStep || 0.01;\r\n let res = OnsetDetection.calculateSF(audioData, FFT, params);\r\n /** \r\n * Spectral flux\r\n * @type {Array} \r\n */ \r\n this.spectralFlux = res;\r\n OnsetDetection.normalize(this.spectralFlux);\r\n /** \r\n * Spectral flux peaks indexes\r\n * @type {Array} \r\n */ \r\n this.peaks = OnsetDetection.findPeaks(this.spectralFlux, params);\r\n /** \r\n * Onsets times array\r\n * @type {Array} \r\n */ \r\n this.events = this.peaks.map(a => a * timeStep);\r\n\r\n let clusters = TempoInduction.processRhythmicEvents(this.events, params);\r\n clusters = TempoInduction.mergeClusters(clusters, params); \r\n let scores = TempoInduction.calculateScore(clusters, params);\r\n clusters = {\r\n clIntervals: clusters.clIntervals,\r\n clSizes: clusters.clSizes,\r\n clScores: scores.clScores,\r\n clScoresIdxs: scores.clScoresIdxs\r\n };\r\n /** \r\n * Tempo hypotheses array\r\n * @type {Array} \r\n */ \r\n this.tempoList = TempoInduction.createTempoList(clusters, params);\r\n\r\n let minSFValue = this.spectralFlux.reduce( (a, b) => Math.min(a, b) );\r\n let eventsScores = this.peaks.map(a => this.spectralFlux[a] - minSFValue);\r\n /** \r\n * Agents array\r\n * @type {Array} \r\n */ \r\n this.agents = BeatTracking.trackBeat(this.events, eventsScores, this.tempoList, params);\r\n\r\n let bestScore = -1;\r\n let idxBestAgent = -1;\r\n /** \r\n * The tempo value in beats per minute\r\n * @type {Number} \r\n */ \r\n this.tempo = -1;\r\n /** \r\n * Beat times array\r\n * @type {Array} \r\n */ \r\n this.beats = [];\r\n /** \r\n * Inter-beat interval\r\n * @type {Number} \r\n */ \r\n this.beatInterval = -1;\r\n\r\n for (let i = 0; i < this.agents.length; i++) {\r\n if(this.agents[i].score > bestScore) {\r\n bestScore = this.agents[i].score;\r\n idxBestAgent = i;\r\n }\r\n }\r\n if (this.agents[idxBestAgent]) {\r\n /** \r\n * The agent with the highest score\r\n * @type {Agent} \r\n */ \r\n this.bestAgent = this.agents[idxBestAgent];\r\n this.bestAgent.fillBeats();\r\n this.tempo = (60 / this.bestAgent.beatInterval).toFixed(3);\r\n this.beatInterval = this.bestAgent.beatInterval;\r\n this.beats = this.bestAgent.events;\r\n }\r\n if (this.tempo == -1) {\r\n throw \"Tempo extraction failed\";\r\n }\r\n }\r\n}", "static": true, "longname": "src/MusicTempo.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 36, "kind": "class", "name": "MusicTempo", "memberof": "src/MusicTempo.js", "static": true, "longname": "src/MusicTempo.js~MusicTempo", "access": null, "export": true, "importPath": "music-tempo/src/MusicTempo.js", "importStyle": "MusicTempo", "description": "Class combines the work of all the steps of tempo extraction", "lineNumber": 10, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 37, "kind": "constructor", "name": "constructor", "memberof": "src/MusicTempo.js~MusicTempo", "generator": false, "async": false, "static": false, "longname": "src/MusicTempo.js~MusicTempo#constructor", "access": null, "description": "Constructor", "lineNumber": 38, "params": [ { "nullable": null, "types": [ "Float32Array" ], "spread": false, "optional": false, "name": "audioData", "description": "non-interleaved IEEE 32-bit linear PCM with a nominal range of -1 -> +1 (Web Audio API - Audio Buffer)" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "2048", "defaultRaw": 2048, "name": "params.bufferSize", "description": "FFT windows size" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "441", "defaultRaw": 441, "name": "params.hopSize", "description": "spacing of audio frames in samples" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.84", "defaultRaw": 0.84, "name": "params.decayRate", "description": "how quickly previous peaks are forgotten" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "6", "defaultRaw": 6, "name": "params.peakFindingWindow", "description": "minimum distance between peaks" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "3", "defaultRaw": 3, "name": "params.meanWndMultiplier", "description": "multiplier for peak finding window" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.35", "defaultRaw": 0.35, "name": "params.peakThreshold", "description": "minimum value of peaks" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.025", "defaultRaw": 0.025, "name": "params.widthTreshold", "description": "the maximum difference in IOIs which are in the same cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "2.5", "defaultRaw": 2.5, "name": "params.maxIOI", "description": "the maximum IOI for inclusion in a cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.07", "defaultRaw": 0.07, "name": "params.minIOI", "description": "the minimum IOI for inclusion in a cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "10", "defaultRaw": 10, "name": "params.maxTempos", "description": "initial amount of tempo hypotheses" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.3", "defaultRaw": 0.3, "name": "params.minBeatInterval", "description": "the minimum inter-beat interval (IBI) (0.30 seconds == 200 BPM)" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "1", "defaultRaw": 1, "name": "params.maxBeatInterval", "description": "the maximum inter-beat interval (IBI) (1.00 seconds == 60 BPM)" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "5", "defaultRaw": 5, "name": "params.initPeriod", "description": "duration of the initial section" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.02", "defaultRaw": 0.02, "name": "params.thresholdBI", "description": "for the purpose of removing duplicate agents, the default JND of IBI" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.04", "defaultRaw": 0.04, "name": "params.thresholdBT", "description": "for the purpose of removing duplicate agents, the default JND of phase" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "10", "defaultRaw": 10, "name": "params.expiryTime", "description": "the time after which an Agent that has not accepted any beat will be destroyed" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.04", "defaultRaw": 0.04, "name": "params.toleranceWndInner", "description": "the maximum time that a beat can deviate from the predicted beat time without a fork occurring" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.15", "defaultRaw": 0.15, "name": "params.toleranceWndPre", "description": "the maximum amount by which a beat can be earlier than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.3", "defaultRaw": 0.3, "name": "params.toleranceWndPost", "description": "the maximum amount by which a beat can be later than the predicted beat time, expressed as a fraction of the beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "50", "defaultRaw": 50, "name": "params.correctionFactor", "description": "correction factor for updating beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.2", "defaultRaw": 0.2, "name": "params.maxChange", "description": "the maximum allowed deviation from the initial tempo, expressed as a fraction of the initial beat period" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.5", "defaultRaw": 0.5, "name": "params.penaltyFactor", "description": "factor for correcting score, if onset do not coincide precisely with predicted beat time" } ] }, { "__docId__": 38, "kind": "member", "name": "spectralFlux", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#spectralFlux", "access": null, "description": "Spectral flux", "lineNumber": 48, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 39, "kind": "member", "name": "peaks", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#peaks", "access": null, "description": "Spectral flux peaks indexes", "lineNumber": 54, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 40, "kind": "member", "name": "events", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#events", "access": null, "description": "Onsets times array", "lineNumber": 59, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 41, "kind": "member", "name": "tempoList", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#tempoList", "access": null, "description": "Tempo hypotheses array", "lineNumber": 74, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 42, "kind": "member", "name": "agents", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#agents", "access": null, "description": "Agents array", "lineNumber": 82, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 43, "kind": "member", "name": "tempo", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#tempo", "access": null, "description": "The tempo value in beats per minute", "lineNumber": 90, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 44, "kind": "member", "name": "beats", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#beats", "access": null, "description": "Beat times array", "lineNumber": 95, "type": { "nullable": null, "types": [ "Array" ], "spread": false, "description": null } }, { "__docId__": 45, "kind": "member", "name": "beatInterval", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#beatInterval", "access": null, "description": "Inter-beat interval", "lineNumber": 100, "type": { "nullable": null, "types": [ "Number" ], "spread": false, "description": null } }, { "__docId__": 46, "kind": "member", "name": "bestAgent", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#bestAgent", "access": null, "description": "The agent with the highest score", "lineNumber": 113, "type": { "nullable": null, "types": [ "Agent" ], "spread": false, "description": null } }, { "__docId__": 47, "kind": "member", "name": "tempo", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#tempo", "access": null, "description": null, "lineNumber": 115, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 48, "kind": "member", "name": "beatInterval", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#beatInterval", "access": null, "description": null, "lineNumber": 116, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 49, "kind": "member", "name": "beats", "memberof": "src/MusicTempo.js~MusicTempo", "static": false, "longname": "src/MusicTempo.js~MusicTempo#beats", "access": null, "description": null, "lineNumber": 117, "undocument": true, "unknown": [ { "tagName": "@_undocument", "tagValue": "" } ], "type": { "types": [ "*" ] } }, { "__docId__": 50, "kind": "file", "name": "src/OnsetDetection.js", "content": "/** \r\n * Spectral flux calculating and peaks finding\r\n * @class\r\n */\r\nexport default class OnsetDetection {\r\n /**\r\n * Get spectral flux\r\n * @param {Float32Array} audioData - non-interleaved IEEE 32-bit linear PCM with a nominal range of -1 -> +1 (Web Audio API - Audio Buffer)\r\n * @param {Object} fft - object with methods for performing FFT\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.bufferSize=2048] - FFT windows size\r\n * @param {Number} [params.hopSize=441] - spacing of audio frames in samples\r\n * @return {Array} spectralFlux - the array of spectral flux values\r\n */ \r\n static calculateSF(audioData, fft, params = {}) {\r\n if (typeof fft == \"undefined\") {\r\n throw new ReferenceError(\"fft is undefined\");\r\n } \r\n if (typeof fft.getHammingWindow !== \"function\" || typeof fft.getSpectrum !== \"function\") {\r\n throw new ReferenceError(\"fft doesn't contain getHammingWindow or getSpectrum methods\");\r\n }\r\n // Array.fill polyfill\r\n if (!Array.prototype.fill) {\r\n Array.prototype.fill = function(value) {\r\n if (this == null) {\r\n throw new TypeError('this is null or not defined');\r\n }\r\n var O = Object(this);\r\n var len = O.length >>> 0;\r\n var start = arguments[1];\r\n var relativeStart = start >> 0;\r\n var k = relativeStart < 0 ?\r\n Math.max(len + relativeStart, 0) :\r\n Math.min(relativeStart, len);\r\n var end = arguments[2];\r\n var relativeEnd = end === undefined ?\r\n len : end >> 0;\r\n var final = relativeEnd < 0 ?\r\n Math.max(len + relativeEnd, 0) :\r\n Math.min(relativeEnd, len);\r\n while (k < final) {\r\n O[k] = value;\r\n k++;\r\n }\r\n return O;\r\n };\r\n } \r\n params.bufferSize = params.bufferSize || 2048;\r\n //params.samplingRate = params.samplingRate || 44100;\r\n params.hopSize = params.hopSize || 441;\r\n\r\n const {bufferSize, hopSize} = params; \r\n\r\n let k = Math.floor(Math.log(bufferSize) / Math.LN2);\r\n if (Math.pow(2, k) !== bufferSize) { \r\n throw \"Invalid buffer size (\" + bufferSize + \"), must be power of 2\"; \r\n }\r\n\r\n const hammWindow = fft.getHammingWindow(bufferSize);\r\n let spectralFlux = [];\r\n let spectrumLength = bufferSize / 2 + 1;\r\n let previousSpectrum = new Array(spectrumLength);\r\n previousSpectrum.fill(0);\r\n let im = new Array(bufferSize);\r\n\r\n let length = audioData.length;\r\n let zerosStart = new Array(bufferSize - hopSize);\r\n zerosStart.fill(0);\r\n audioData = zerosStart.concat(audioData); \r\n\r\n let zerosEnd = new Array(bufferSize - (audioData.length % hopSize));\r\n zerosEnd.fill(0);\r\n audioData = audioData.concat(zerosEnd);\r\n \r\n for (let wndStart = 0; wndStart < length; wndStart += hopSize) { \r\n let wndEnd = wndStart + bufferSize;\r\n\r\n let re = [];\r\n let k = 0;\r\n for (let i = wndStart; i < wndEnd; i++) {\r\n re[k] = hammWindow[k] * audioData[i];\r\n k++;\r\n }\r\n im.fill(0);\r\n\r\n fft.getSpectrum(re, im);\r\n\r\n let flux = 0;\r\n for(let j = 0; j < spectrumLength; j++) {\r\n let value = re[j] - previousSpectrum[j];\r\n flux += value < 0 ? 0 : value;\r\n }\r\n spectralFlux.push(flux);\r\n\r\n previousSpectrum = re; \r\n }\r\n\r\n return spectralFlux;\r\n }\r\n /**\r\n * Normalize data to have a mean of 0 and standard deviation of 1\r\n * @param {Array} data - data array\r\n */ \r\n static normalize(data) {\r\n if (!Array.isArray(data)) {\r\n throw \"Array expected\";\r\n }\r\n if (data.length == 0) {\r\n throw \"Array is empty\";\r\n }\r\n let sum = 0;\r\n let squareSum = 0;\r\n for (let i = 0; i < data.length; i++) {\r\n sum += data[i];\r\n squareSum += data[i] * data[i];\r\n }\r\n let mean = sum / data.length;\r\n let standardDeviation = Math.sqrt( (squareSum - sum * mean) / data.length );\r\n if (standardDeviation == 0)\r\n standardDeviation = 1; \r\n for (let i = 0; i < data.length; i++) {\r\n data[i] = (data[i] - mean) / standardDeviation;\r\n }\r\n } \r\n /**\r\n * Finding local maxima in an array\r\n * @param {Array} spectralFlux - input data\r\n * @param {Object} [params={}] - parametrs\r\n * @param {Number} [params.decayRate=0.84] - how quickly previous peaks are forgotten\r\n * @param {Number} [params.peakFindingWindow=6] - minimum distance between peaks\r\n * @param {Number} [params.meanWndMultiplier=3] - multiplier for peak finding window\r\n * @param {Number} [params.peakThreshold=0.35] - minimum value of peaks\r\n * @return {Array} peaks - array of peak indexes\r\n */ \r\n static findPeaks(spectralFlux, params = {}) {\r\n const length = spectralFlux.length;\r\n const sf = spectralFlux;\r\n const decayRate = params.decayRate || 0.84;\r\n const peakFindingWindow = params.peakFindingWindow || 6;\r\n const meanWndMultiplier = params.meanWndMultiplier || 3;\r\n const peakThreshold = params.peakThreshold || 0.35;\r\n \r\n let max = 0;\r\n let av = sf[0];\r\n let peaks = [];\r\n\r\n for (let i = 0; i < length; i++) {\r\n av = decayRate * av + (1 - decayRate) * sf[i];\r\n if (sf[i] < av) continue;\r\n\r\n let wndStart = i - peakFindingWindow;\r\n let wndEnd = i + peakFindingWindow + 1;\r\n\r\n if (wndStart < 0) wndStart = 0;\r\n if (wndEnd > length) wndEnd = length;\r\n if (av < sf[i]) av = sf[i];\r\n\r\n let isMax = true;\r\n for (let j = wndStart; j < wndEnd; j++) {\r\n if (sf[j] > sf[i]) isMax = false; \r\n }\r\n if (isMax) {\r\n let meanWndStart = i - peakFindingWindow * meanWndMultiplier;\r\n let meanWndEnd = i + peakFindingWindow;\r\n if (meanWndStart < 0) meanWndStart = 0;\r\n if (meanWndEnd > length) meanWndEnd = length;\r\n let sum = 0;\r\n let count = meanWndEnd - meanWndStart;\r\n for (let j = meanWndStart; j < meanWndEnd; j++) {\r\n sum += sf[j];\r\n }\r\n if (sf[i] > sum / count + peakThreshold) {\r\n peaks.push(i);\r\n }\r\n }\r\n }\r\n\r\n if (peaks.length < 2) {\r\n throw \"Fail to find peaks\";\r\n }\r\n return peaks;\r\n } \r\n}", "static": true, "longname": "src/OnsetDetection.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 51, "kind": "class", "name": "OnsetDetection", "memberof": "src/OnsetDetection.js", "static": true, "longname": "src/OnsetDetection.js~OnsetDetection", "access": null, "export": true, "importPath": "music-tempo/src/OnsetDetection.js", "importStyle": "OnsetDetection", "description": "Spectral flux calculating and peaks finding", "lineNumber": 5, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 52, "kind": "method", "name": "calculateSF", "memberof": "src/OnsetDetection.js~OnsetDetection", "generator": false, "async": false, "static": true, "longname": "src/OnsetDetection.js~OnsetDetection.calculateSF", "access": null, "description": "Get spectral flux", "lineNumber": 15, "params": [ { "nullable": null, "types": [ "Float32Array" ], "spread": false, "optional": false, "name": "audioData", "description": "non-interleaved IEEE 32-bit linear PCM with a nominal range of -1 -> +1 (Web Audio API - Audio Buffer)" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": false, "name": "fft", "description": "object with methods for performing FFT" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "2048", "defaultRaw": 2048, "name": "params.bufferSize", "description": "FFT windows size" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "441", "defaultRaw": 441, "name": "params.hopSize", "description": "spacing of audio frames in samples" } ], "return": { "nullable": null, "types": [ "Array" ], "spread": false, "description": "spectralFlux - the array of spectral flux values" } }, { "__docId__": 53, "kind": "method", "name": "normalize", "memberof": "src/OnsetDetection.js~OnsetDetection", "generator": false, "async": false, "static": true, "longname": "src/OnsetDetection.js~OnsetDetection.normalize", "access": null, "description": "Normalize data to have a mean of 0 and standard deviation of 1", "lineNumber": 104, "params": [ { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "data", "description": "data array" } ] }, { "__docId__": 54, "kind": "method", "name": "findPeaks", "memberof": "src/OnsetDetection.js~OnsetDetection", "generator": false, "async": false, "static": true, "longname": "src/OnsetDetection.js~OnsetDetection.findPeaks", "access": null, "description": "Finding local maxima in an array", "lineNumber": 135, "params": [ { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "spectralFlux", "description": "input data" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parametrs" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.84", "defaultRaw": 0.84, "name": "params.decayRate", "description": "how quickly previous peaks are forgotten" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "6", "defaultRaw": 6, "name": "params.peakFindingWindow", "description": "minimum distance between peaks" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "3", "defaultRaw": 3, "name": "params.meanWndMultiplier", "description": "multiplier for peak finding window" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.35", "defaultRaw": 0.35, "name": "params.peakThreshold", "description": "minimum value of peaks" } ], "return": { "nullable": null, "types": [ "Array" ], "spread": false, "description": "peaks - array of peak indexes" } }, { "__docId__": 55, "kind": "file", "name": "src/TempoInduction.js", "content": "/** \r\n * Performs tempo induction by finding clusters of similar inter-onset intervals (IOIs)\r\n * @class\r\n */\r\nexport default class TempoInduction {\r\n /**\r\n * Find clusters\r\n * @param {Array} events - the onsets from which the tempo is induced\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.widthTreshold=0.025] - the maximum difference in IOIs which are in the same cluster\r\n * @param {Number} [params.maxIOI=2.5] - the maximum IOI for inclusion in a cluster\r\n * @param {Number} [params.minIOI=0.07] - the minimum IOI for inclusion in a cluster\r\n * @return {{clIntervals: Array, clSizes: Array}} - object with clusters\r\n */ \r\n static processRhythmicEvents(events, params = {}) {\r\n const widthTreshold = params.widthTreshold || 0.025,\r\n maxIOI = params.maxIOI || 2.5,\r\n minIOI = params.minIOI || 0.07,\r\n length = events.length;\r\n\r\n let clIntervals = [],\r\n clSizes = [],\r\n clCount = 0;\r\n\r\n for (let i = 0; i < length - 1; i++) {\r\n for(let j = i + 1; j < length; j++) {\r\n let ioi = events[j] - events[i];\r\n if (ioi < minIOI) {\r\n continue\r\n } \r\n if (ioi > maxIOI) {\r\n break;\r\n }\r\n let k = 0;\r\n for ( ; k < clCount; k++) {\r\n if (Math.abs(clIntervals[k] - ioi) < widthTreshold) {\r\n if ( Math.abs(clIntervals[k + 1] - ioi) < Math.abs(clIntervals[k] - ioi) \r\n && k < clCount - 1 ) {\r\n k++;\r\n }\r\n clIntervals[k] = (clIntervals[k] * clSizes[k] + ioi) / (clSizes[k] + 1);\r\n clSizes[k]++;\r\n break;\r\n }\r\n }\r\n if (k != clCount) continue;\r\n clCount++;\r\n for ( ; k > 0 && clIntervals[k - 1] > ioi; k--) {\r\n clIntervals[k] = clIntervals[k - 1];\r\n clSizes[k] = clSizes[k - 1];\r\n }\r\n clIntervals[k] = ioi;\r\n clSizes[k] = 1;\r\n }\r\n }\r\n if (clCount == 0) {\r\n throw \"Fail to find IOIs\";\r\n }\r\n clIntervals.length = clCount;\r\n clSizes.length = clCount;\r\n return {clIntervals, clSizes};\r\n }\r\n /**\r\n * Merge similar intervals\r\n * @param {Object} clusters - object with clusters\r\n * @param {Array} clusters.clIntervals - clusters IOIs array\r\n * @param {Array} clusters.clSizes - clusters sizes array\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.widthTreshold=0.025] - the maximum difference in IOIs which are in the same cluster\r\n * @return {{clIntervals: Array, clSizes: Array}} - object with clusters\r\n */\r\n static mergeClusters(clusters, params = {}) {\r\n const widthTreshold = params.widthTreshold || 0.025;\r\n\r\n let clIntervals = clusters.clIntervals,\r\n clSizes = clusters.clSizes;\r\n let clCount = clIntervals.length;\r\n\r\n for (let i = 0; i < clCount; i++)\r\n for (let j = i + 1; j < clCount; j++)\r\n if (Math.abs(clIntervals[i] - clIntervals[j]) < widthTreshold) {\r\n clIntervals[i] = \r\n (clIntervals[i] * clSizes[i] + \r\n clIntervals[j] * clSizes[j]) / \r\n (clSizes[i] + clSizes[j]);\r\n clSizes[i] = clSizes[i] + clSizes[j];\r\n --clCount;\r\n for (let k = j + 1; k <= clCount; k++) {\r\n clIntervals[k-1] = clIntervals[k];\r\n clSizes[k-1] = clSizes[k];\r\n }\r\n }\r\n clIntervals.length = clCount;\r\n clSizes.length = clCount;\r\n return {clIntervals, clSizes};\r\n }\r\n /**\r\n * Score intervals\r\n * @param {Object} clusters - object with clusters\r\n * @param {Array} clusters.clIntervals - clusters IOIs array\r\n * @param {Array} clusters.clSizes - clusters sizes array\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.widthTreshold=0.025] - the maximum difference in IOIs which are in the same cluster\r\n * @param {Number} [params.maxTempos=10] - initial amount of tempo hypotheses\r\n * @return {{clScores: Array, clScoresIdxs: Array}} - object with intervals scores\r\n */\r\n static calculateScore(clusters, params = {}) {\r\n const widthTreshold = params.widthTreshold || 0.025;\r\n let maxTempos = params.maxTempos || 10;\r\n\r\n let clIntervals = clusters.clIntervals,\r\n clSizes = clusters.clSizes,\r\n clScores = [],\r\n clScoresIdxs = [];\r\n let clCount = clIntervals.length;\r\n\r\n for (let i = 0; i < clCount; i++) {\r\n clScores[i] = 10 * clSizes[i];\r\n clScoresIdxs[i] = { score: clScores[i], idx: i};\r\n } \r\n\r\n clScoresIdxs.sort( (a, b) => b.score - a.score );\r\n if (clScoresIdxs.length > maxTempos) {\r\n for (let i = maxTempos - 1; i < clScoresIdxs.length - 1; i++) {\r\n if (clScoresIdxs[i].score == clScoresIdxs[i + 1].score) {\r\n maxTempos++;\r\n } else {\r\n break;\r\n }\r\n }\r\n clScoresIdxs.length = maxTempos;\r\n }\r\n\r\n clScoresIdxs = clScoresIdxs.map( a => a.idx );\r\n\r\n for (let i = 0; i < clCount; i++) {\r\n for (let j = i + 1; j < clCount; j++) {\r\n let ratio = clIntervals[i] / clIntervals[j];\r\n let isFraction = ratio < 1;\r\n let d, err;\r\n d = isFraction ? Math.round(1 / ratio) : Math.round(ratio);\r\n if (d < 2 || d > 8) continue;\r\n\r\n if (isFraction)\r\n err = Math.abs(clIntervals[i] * d - clIntervals[j]);\r\n else\r\n err = Math.abs(clIntervals[i] - clIntervals[j] * d);\r\n let errTreshold = isFraction ? widthTreshold : widthTreshold * d;\r\n if (err >= errTreshold) continue;\r\n\r\n d = d >= 5 ? 1 : 6 - d;\r\n clScores[i] += d * clSizes[j];\r\n clScores[j] += d * clSizes[i];\r\n }\r\n }\r\n return {clScores, clScoresIdxs};\r\n }\r\n /**\r\n * Get array of tempo hypotheses\r\n * @param {Object} clusters - object with clusters\r\n * @param {Array} clusters.clIntervals - clusters IOIs array\r\n * @param {Array} clusters.clSizes - clusters sizes array\r\n * @param {Array} clusters.clScores - clusters scores array\r\n * @param {Array} clusters.clScoresIdxs - clusters scores indexes array\r\n * @param {Object} [params={}] - parameters\r\n * @param {Number} [params.widthTreshold=0.025] - the maximum difference in IOIs which are in the same cluster\r\n * @param {Number} [params.minBeatInterval=0.3] - the minimum inter-beat interval (IBI) (0.30 seconds == 200 BPM)\r\n * @param {Number} [params.maxBeatInterval=1] - the maximum inter-beat interval (IBI) (1.00 seconds == 60 BPM)\r\n * @return {Array} tempoList - tempo hypotheses array\r\n */\r\n static createTempoList(clusters, params = {}) {\r\n const widthTreshold = params.widthTreshold || 0.025,\r\n minBeatInterval = params.minBeatInterval || 0.3,\r\n maxBeatInterval = params.maxBeatInterval || 1;\r\n let clIntervals = clusters.clIntervals,\r\n clSizes = clusters.clSizes,\r\n clScores = clusters.clScores,\r\n clScoresIdxs = clusters.clScoresIdxs,\r\n tempoList = [];\r\n let clCount = clIntervals.length;\r\n\r\n for (let i = 0; i < clScoresIdxs.length; i++) {\r\n let idx = clScoresIdxs[i]; \r\n let newSum = clIntervals[idx] * clScores[idx];\r\n let newWeight = clScores[idx];\r\n let err, errTreshold;\r\n for (let j = 0; j < clCount; j++) {\r\n if (j == idx) continue;\r\n let ratio = clIntervals[idx] / clIntervals[j];\r\n let isFraction = ratio < 1;\r\n let sumInc = 0;\r\n let d = isFraction ? Math.round(1 / ratio) : Math.round(ratio);\r\n if (d < 2 || d > 8) continue;\r\n\r\n if (isFraction) {\r\n err = Math.abs(clIntervals[idx] * d - clIntervals[j]);\r\n errTreshold = widthTreshold;\r\n } else {\r\n err = Math.abs(clIntervals[idx] - d * clIntervals[j]);\r\n errTreshold = widthTreshold * d;\r\n }\r\n if (err >= errTreshold) continue;\r\n\r\n if (isFraction) {\r\n newSum += clIntervals[j] / d * clScores[j];\r\n } else {\r\n newSum += clIntervals[j] * d * clScores[j];\r\n }\r\n newWeight += clScores[j];\r\n }\r\n let beat = newSum / newWeight;\r\n \r\n while (beat < minBeatInterval) beat *= 2;\r\n while (beat > maxBeatInterval) beat /= 2;\r\n\r\n tempoList.push(beat);\r\n }\r\n return tempoList;\r\n } \r\n}", "static": true, "longname": "src/TempoInduction.js", "access": null, "description": null, "lineNumber": 1 }, { "__docId__": 56, "kind": "class", "name": "TempoInduction", "memberof": "src/TempoInduction.js", "static": true, "longname": "src/TempoInduction.js~TempoInduction", "access": null, "export": true, "importPath": "music-tempo/src/TempoInduction.js", "importStyle": "TempoInduction", "description": "Performs tempo induction by finding clusters of similar inter-onset intervals (IOIs)", "lineNumber": 5, "unknown": [ { "tagName": "@class", "tagValue": "" } ], "interface": false }, { "__docId__": 57, "kind": "method", "name": "processRhythmicEvents", "memberof": "src/TempoInduction.js~TempoInduction", "generator": false, "async": false, "static": true, "longname": "src/TempoInduction.js~TempoInduction.processRhythmicEvents", "access": null, "description": "Find clusters", "lineNumber": 15, "params": [ { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "events", "description": "the onsets from which the tempo is induced" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.025", "defaultRaw": 0.025, "name": "params.widthTreshold", "description": "the maximum difference in IOIs which are in the same cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "2.5", "defaultRaw": 2.5, "name": "params.maxIOI", "description": "the maximum IOI for inclusion in a cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.07", "defaultRaw": 0.07, "name": "params.minIOI", "description": "the minimum IOI for inclusion in a cluster" } ], "return": { "nullable": null, "types": [ "{clIntervals: Array, clSizes: Array}" ], "spread": false, "description": "object with clusters" } }, { "__docId__": 58, "kind": "method", "name": "mergeClusters", "memberof": "src/TempoInduction.js~TempoInduction", "generator": false, "async": false, "static": true, "longname": "src/TempoInduction.js~TempoInduction.mergeClusters", "access": null, "description": "Merge similar intervals", "lineNumber": 72, "params": [ { "nullable": null, "types": [ "Object" ], "spread": false, "optional": false, "name": "clusters", "description": "object with clusters" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clIntervals", "description": "clusters IOIs array" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clSizes", "description": "clusters sizes array" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.025", "defaultRaw": 0.025, "name": "params.widthTreshold", "description": "the maximum difference in IOIs which are in the same cluster" } ], "return": { "nullable": null, "types": [ "{clIntervals: Array, clSizes: Array}" ], "spread": false, "description": "object with clusters" } }, { "__docId__": 59, "kind": "method", "name": "calculateScore", "memberof": "src/TempoInduction.js~TempoInduction", "generator": false, "async": false, "static": true, "longname": "src/TempoInduction.js~TempoInduction.calculateScore", "access": null, "description": "Score intervals", "lineNumber": 107, "params": [ { "nullable": null, "types": [ "Object" ], "spread": false, "optional": false, "name": "clusters", "description": "object with clusters" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clIntervals", "description": "clusters IOIs array" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clSizes", "description": "clusters sizes array" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.025", "defaultRaw": 0.025, "name": "params.widthTreshold", "description": "the maximum difference in IOIs which are in the same cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "10", "defaultRaw": 10, "name": "params.maxTempos", "description": "initial amount of tempo hypotheses" } ], "return": { "nullable": null, "types": [ "{clScores: Array, clScoresIdxs: Array}" ], "spread": false, "description": "object with intervals scores" } }, { "__docId__": 60, "kind": "method", "name": "createTempoList", "memberof": "src/TempoInduction.js~TempoInduction", "generator": false, "async": false, "static": true, "longname": "src/TempoInduction.js~TempoInduction.createTempoList", "access": null, "description": "Get array of tempo hypotheses", "lineNumber": 171, "params": [ { "nullable": null, "types": [ "Object" ], "spread": false, "optional": false, "name": "clusters", "description": "object with clusters" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clIntervals", "description": "clusters IOIs array" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clSizes", "description": "clusters sizes array" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clScores", "description": "clusters scores array" }, { "nullable": null, "types": [ "Array" ], "spread": false, "optional": false, "name": "clusters.clScoresIdxs", "description": "clusters scores indexes array" }, { "nullable": null, "types": [ "Object" ], "spread": false, "optional": true, "defaultValue": "{}", "defaultRaw": {}, "name": "params", "description": "parameters" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.025", "defaultRaw": 0.025, "name": "params.widthTreshold", "description": "the maximum difference in IOIs which are in the same cluster" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "0.3", "defaultRaw": 0.3, "name": "params.minBeatInterval", "description": "the minimum inter-beat interval (IBI) (0.30 seconds == 200 BPM)" }, { "nullable": null, "types": [ "Number" ], "spread": false, "optional": true, "defaultValue": "1", "defaultRaw": 1, "name": "params.maxBeatInterval", "description": "the maximum inter-beat interval (IBI) (1.00 seconds == 60 BPM)" } ], "return": { "nullable": null, "types": [ "Array" ], "spread": false, "description": "tempoList - tempo hypotheses array" } }, { "__docId__": 62, "kind": "external", "name": "Infinity", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Infinity", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Infinity", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 63, "kind": "external", "name": "NaN", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NaN", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~NaN", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 64, "kind": "external", "name": "undefined", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~undefined", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 65, "kind": "external", "name": "null", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/null", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~null", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 66, "kind": "external", "name": "Object", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Object", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 67, "kind": "external", "name": "object", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~object", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 68, "kind": "external", "name": "Function", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Function", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 69, "kind": "external", "name": "function", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~function", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 70, "kind": "external", "name": "Boolean", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Boolean", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 71, "kind": "external", "name": "boolean", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~boolean", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 72, "kind": "external", "name": "Symbol", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Symbol", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 73, "kind": "external", "name": "Error", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Error", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 74, "kind": "external", "name": "EvalError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/EvalError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~EvalError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 75, "kind": "external", "name": "InternalError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/InternalError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~InternalError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 76, "kind": "external", "name": "RangeError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RangeError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~RangeError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 77, "kind": "external", "name": "ReferenceError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~ReferenceError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 78, "kind": "external", "name": "SyntaxError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~SyntaxError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 79, "kind": "external", "name": "TypeError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~TypeError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 80, "kind": "external", "name": "URIError", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/URIError", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~URIError", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 81, "kind": "external", "name": "Number", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Number", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 82, "kind": "external", "name": "number", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~number", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 83, "kind": "external", "name": "Date", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Date", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 84, "kind": "external", "name": "String", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~String", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 85, "kind": "external", "name": "string", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~string", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 86, "kind": "external", "name": "RegExp", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~RegExp", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 87, "kind": "external", "name": "Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 88, "kind": "external", "name": "Int8Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Int8Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 89, "kind": "external", "name": "Uint8Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Uint8Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 90, "kind": "external", "name": "Uint8ClampedArray", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Uint8ClampedArray", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 91, "kind": "external", "name": "Int16Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Int16Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 92, "kind": "external", "name": "Uint16Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Uint16Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 93, "kind": "external", "name": "Int32Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Int32Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 94, "kind": "external", "name": "Uint32Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Uint32Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 95, "kind": "external", "name": "Float32Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Float32Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 96, "kind": "external", "name": "Float64Array", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Float64Array", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 97, "kind": "external", "name": "Map", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Map", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 98, "kind": "external", "name": "Set", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Set", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 99, "kind": "external", "name": "WeakMap", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~WeakMap", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 100, "kind": "external", "name": "WeakSet", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~WeakSet", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 101, "kind": "external", "name": "ArrayBuffer", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~ArrayBuffer", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 102, "kind": "external", "name": "DataView", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~DataView", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 103, "kind": "external", "name": "JSON", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~JSON", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 104, "kind": "external", "name": "Promise", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Promise", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 105, "kind": "external", "name": "Generator", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Generator", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Generator", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 106, "kind": "external", "name": "GeneratorFunction", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/GeneratorFunction", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~GeneratorFunction", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 107, "kind": "external", "name": "Reflect", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Reflect", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 108, "kind": "external", "name": "Proxy", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy", "memberof": "BuiltinExternal/ECMAScriptExternal.js", "static": true, "longname": "BuiltinExternal/ECMAScriptExternal.js~Proxy", "access": null, "description": "", "lineNumber": 193, "builtinExternal": true }, { "__docId__": 110, "kind": "external", "name": "CanvasRenderingContext2D", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~CanvasRenderingContext2D", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 111, "kind": "external", "name": "DocumentFragment", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/DocumentFragment", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~DocumentFragment", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 112, "kind": "external", "name": "Element", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/Element", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~Element", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 113, "kind": "external", "name": "Event", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/Event", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~Event", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 114, "kind": "external", "name": "Node", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/Node", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~Node", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 115, "kind": "external", "name": "NodeList", "externalLink": "https://developer.mozilla.org/en-US/docs/Web/API/NodeList", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~NodeList", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 116, "kind": "external", "name": "XMLHttpRequest", "externalLink": "https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~XMLHttpRequest", "access": null, "description": "", "builtinExternal": true }, { "__docId__": 117, "kind": "external", "name": "AudioContext", "externalLink": "https://developer.mozilla.org/en/docs/Web/API/AudioContext", "memberof": "BuiltinExternal/WebAPIExternal.js", "static": true, "longname": "BuiltinExternal/WebAPIExternal.js~AudioContext", "access": null, "description": "", "lineNumber": 34, "builtinExternal": true } ]