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* Minified by jsDelivr using Terser v5.39.0.\n * Original file: /npm/jsfxr@1.3.0/sfxr.js\n *\n * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","// Wave shapes\nvar SQUARE = 0;\nvar SAWTOOTH = 1;\nvar SINE = 2;\nvar NOISE = 3;\n\n// Playback volume\nvar masterVolume = 1;\n\nvar OVERSAMPLING = 8;\n\n/*** Core data structure ***/\n\n// Sound generation parameters are on [0,1] unless noted SIGNED & thus\n// on [-1,1]\nfunction Params() {\n this.oldParams = true; // Note what structure this is\n\n // Wave shape\n this.wave_type = SQUARE;\n\n // Envelope\n this.p_env_attack = 0; // Attack time\n this.p_env_sustain = 0.3; // Sustain time\n this.p_env_punch = 0; // Sustain punch\n this.p_env_decay = 0.4; // Decay time\n\n // Tone\n this.p_base_freq = 0.3; // Start frequency\n this.p_freq_limit = 0; // Min frequency cutoff\n this.p_freq_ramp = 0; // Slide (SIGNED)\n this.p_freq_dramp = 0; // Delta slide (SIGNED)\n // Vibrato\n this.p_vib_strength = 0; // Vibrato depth\n this.p_vib_speed = 0; // Vibrato speed\n\n // Tonal change\n this.p_arp_mod = 0; // Change amount (SIGNED)\n this.p_arp_speed = 0; // Change speed\n\n // Square wave duty (proportion of time signal is high vs. low)\n this.p_duty = 0; // Square duty\n this.p_duty_ramp = 0; // Duty sweep (SIGNED)\n\n // Repeat\n this.p_repeat_speed = 0; // Repeat speed\n\n // Flanger\n this.p_pha_offset = 0; // Flanger offset (SIGNED)\n this.p_pha_ramp = 0; // Flanger sweep (SIGNED)\n\n // Low-pass filter\n this.p_lpf_freq = 1; // Low-pass filter cutoff\n this.p_lpf_ramp = 0; // Low-pass filter cutoff sweep (SIGNED)\n this.p_lpf_resonance = 0;// Low-pass filter resonance\n // High-pass filter\n this.p_hpf_freq = 0; // High-pass filter cutoff\n this.p_hpf_ramp = 0; // High-pass filter cutoff sweep (SIGNED)\n\n // Sample parameters\n this.sound_vol = 0.5;\n this.sample_rate = 44100;\n this.sample_size = 8;\n}\n\n/*** Helper functions ***/\n\nfunction sqr(x) { return x * x }\nfunction cube(x) { return x * x * x }\nfunction sign(x) { return x < 0 ? -1 : 1 }\nfunction log(x, b) { return Math.log(x) / Math.log(b); }\nvar pow = Math.pow;\n\nfunction frnd(range) {\n return Math.random() * range;\n}\n\nfunction rndr(from, to) {\n return Math.random() * (to - from) + from;\n}\n\nfunction rnd(max) {\n return Math.floor(Math.random() * (max + 1));\n}\n\n/*** Import/export functions ***/\n\n// http://stackoverflow.com/questions/3096646/how-to-convert-a-floating-point-number-to-its-binary-representation-ieee-754-i\nfunction assembleFloat(sign, exponent, mantissa)\n{\n return (sign << 31) | (exponent << 23) | (mantissa);\n}\n\nfunction floatToNumber(flt)\n{\n if (isNaN(flt)) // Special case: NaN\n return assembleFloat(0, 0xFF, 0x1337); // Mantissa is nonzero for NaN\n\n var sign = (flt < 0) ? 1 : 0;\n flt = Math.abs(flt);\n if (flt == 0.0) // Special case: +-0\n return assembleFloat(sign, 0, 0);\n\n var exponent = Math.floor(Math.log(flt) / Math.LN2);\n if (exponent > 127 || exponent < -126) // Special case: +-Infinity (and huge numbers)\n return assembleFloat(sign, 0xFF, 0); // Mantissa is zero for +-Infinity\n\n var mantissa = flt / Math.pow(2, exponent);\n return assembleFloat(sign, exponent + 127, (mantissa * Math.pow(2, 23)) & 0x7FFFFF);\n}\n\n// http://stackoverflow.com/a/16001019\nfunction numberToFloat(bytes) {\n var sign = (bytes & 0x80000000) ? -1 : 1;\n var exponent = ((bytes >> 23) & 0xFF) - 127;\n var significand = (bytes & ~(-1 << 23));\n\n if (exponent == 128) \n return sign * ((significand) ? Number.NaN : Number.POSITIVE_INFINITY);\n\n if (exponent == -127) {\n if (significand == 0) return sign * 0.0;\n exponent = -126;\n significand /= (1 << 22);\n } else significand = (significand | (1 << 23)) / (1 << 23);\n\n return sign * significand * Math.pow(2, exponent);\n}\n\n// export parameter list to URL friendly base58 string\n// https://gist.github.com/diafygi/90a3e80ca1c2793220e5/\nvar b58alphabet = \"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz\";\nvar params_order = [\n \"wave_type\",\n \"p_env_attack\",\n \"p_env_sustain\",\n \"p_env_punch\",\n \"p_env_decay\",\n \"p_base_freq\",\n \"p_freq_limit\",\n \"p_freq_ramp\",\n \"p_freq_dramp\",\n \"p_vib_strength\",\n \"p_vib_speed\",\n \"p_arp_mod\",\n \"p_arp_speed\",\n \"p_duty\",\n \"p_duty_ramp\",\n \"p_repeat_speed\",\n \"p_pha_offset\",\n \"p_pha_ramp\",\n \"p_lpf_freq\",\n \"p_lpf_ramp\",\n \"p_lpf_resonance\",\n \"p_hpf_freq\",\n \"p_hpf_ramp\"\n];\n\nvar params_signed = [\"p_freq_ramp\", \"p_freq_dramp\", \"p_arp_mod\", \"p_duty_ramp\", \"p_pha_offset\", \"p_pha_ramp\", \"p_lpf_ramp\", \"p_hpf_ramp\"];\n\nParams.prototype.toB58 = function() {\n var convert = [];\n for (var pi in params_order) {\n var p = params_order[pi];\n if (p == \"wave_type\") {\n convert.push(this[p]);\n } else if (p.indexOf(\"p_\") == 0) {\n var val = this[p];\n val = floatToNumber(val);\n convert.push(0xff & val);\n convert.push(0xff & (val >> 8))\n convert.push(0xff & (val >> 16))\n convert.push(0xff & (val >> 24))\n }\n }\n return function(B,A){var d=[],s=\"\",i,j,c,n;for(i in B){j=0,c=B[i];s+=c||s.length^i?\"\":1;while(j in d||c){n=d[j];n=n?n*256+c:c;c=n/58|0;d[j]=n%58;j++}}while(j--)s+=A[d[j]];return s}(convert, b58alphabet);\n}\n\nParams.prototype.fromB58 = function(b58encoded) {\n this.fromJSON(sfxr.b58decode(b58encoded));\n return this;\n}\n\nParams.prototype.fromJSON = function(struct) {\n for (var p in struct) {\n if (struct.hasOwnProperty(p)) {\n this[p] = struct[p];\n }\n }\n return this;\n}\n\n/*** Presets ***/\n\n// These functions roll up random sounds appropriate to various\n// typical game events:\n\nParams.prototype.pickupCoin = function () {\n this.wave_type = SAWTOOTH;\n this.p_base_freq = 0.4 + frnd(0.5);\n this.p_env_attack = 0;\n this.p_env_sustain = frnd(0.1);\n this.p_env_decay = 0.1 + frnd(0.4);\n this.p_env_punch = 0.3 + frnd(0.3);\n if (rnd(1)) {\n this.p_arp_speed = 0.5 + frnd(0.2);\n this.p_arp_mod = 0.2 + frnd(0.4);\n }\n return this;\n}\n\nParams.prototype.laserShoot = function () {\n this.wave_type = rnd(2);\n if(this.wave_type === SINE && rnd(1))\n this.wave_type = rnd(1);\n if (rnd(2) === 0) {\n this.p_base_freq = 0.3 + frnd(0.6);\n this.p_freq_limit = frnd(0.1);\n this.p_freq_ramp = -0.35 - frnd(0.3);\n } else {\n this.p_base_freq = 0.5 + frnd(0.5);\n this.p_freq_limit = this.p_base_freq - 0.2 - frnd(0.6);\n if (this.p_freq_limit < 0.2) this.p_freq_limit = 0.2;\n this.p_freq_ramp = -0.15 - frnd(0.2);\n }\n if (this.wave_type === SAWTOOTH)\n this.p_duty = 1;\n if (rnd(1)) {\n this.p_duty = frnd(0.5);\n this.p_duty_ramp = frnd(0.2);\n } else {\n this.p_duty = 0.4 + frnd(0.5);\n this.p_duty_ramp = -frnd(0.7);\n }\n this.p_env_attack = 0;\n this.p_env_sustain = 0.1 + frnd(0.2);\n this.p_env_decay = frnd(0.4);\n if (rnd(1))\n this.p_env_punch = frnd(0.3);\n if (rnd(2) === 0) {\n this.p_pha_offset = frnd(0.2);\n this.p_pha_ramp = -frnd(0.2);\n }\n //if (rnd(1))\n this.p_hpf_freq = frnd(0.3);\n\n return this;\n}\n\nParams.prototype.explosion = function () {\n this.wave_type = NOISE;\n if (rnd(1)) {\n this.p_base_freq = sqr(0.1 + frnd(0.4));\n this.p_freq_ramp = -0.1 + frnd(0.4);\n } else {\n this.p_base_freq = sqr(0.2 + frnd(0.7));\n this.p_freq_ramp = -0.2 - frnd(0.2);\n }\n if (rnd(4) === 0)\n this.p_freq_ramp = 0;\n if (rnd(2) === 0)\n this.p_repeat_speed = 0.3 + frnd(0.5);\n this.p_env_attack = 0;\n this.p_env_sustain = 0.1 + frnd(0.3);\n this.p_env_decay = frnd(0.5);\n if (rnd(1)) {\n this.p_pha_offset = -0.3 + frnd(0.9);\n this.p_pha_ramp = -frnd(0.3);\n }\n this.p_env_punch = 0.2 + frnd(0.6);\n if (rnd(1)) {\n this.p_vib_strength = frnd(0.7);\n this.p_vib_speed = frnd(0.6);\n }\n if (rnd(2) === 0) {\n this.p_arp_speed = 0.6 + frnd(0.3);\n this.p_arp_mod = 0.8 - frnd(1.6);\n }\n\n return this;\n}\n\nParams.prototype.powerUp = function () {\n if (rnd(1)) {\n this.wave_type = SAWTOOTH;\n this.p_duty = 1;\n } else {\n this.p_duty = frnd(0.6);\n }\n this.p_base_freq = 0.2 + frnd(0.3);\n if (rnd(1)) {\n this.p_freq_ramp = 0.1 + frnd(0.4);\n this.p_repeat_speed = 0.4 + frnd(0.4);\n } else {\n this.p_freq_ramp = 0.05 + frnd(0.2);\n if (rnd(1)) {\n this.p_vib_strength = frnd(0.7);\n this.p_vib_speed = frnd(0.6);\n }\n }\n this.p_env_attack = 0;\n this.p_env_sustain = frnd(0.4);\n this.p_env_decay = 0.1 + frnd(0.4);\n\n return this;\n}\n\nParams.prototype.hitHurt = function () {\n this.wave_type = rnd(2);\n if (this.wave_type === SINE)\n this.wave_type = NOISE;\n if (this.wave_type === SQUARE)\n this.p_duty = frnd(0.6);\n if (this.wave_type === SAWTOOTH)\n this.p_duty = 1;\n this.p_base_freq = 0.2 + frnd(0.6);\n this.p_freq_ramp = -0.3 - frnd(0.4);\n this.p_env_attack = 0;\n this.p_env_sustain = frnd(0.1);\n this.p_env_decay = 0.1 + frnd(0.2);\n if (rnd(1))\n this.p_hpf_freq = frnd(0.3);\n return this;\n}\n\nParams.prototype.jump = function () {\n this.wave_type = SQUARE;\n this.p_duty = frnd(0.6);\n this.p_base_freq = 0.3 + frnd(0.3);\n this.p_freq_ramp = 0.1 + frnd(0.2);\n this.p_env_attack = 0;\n this.p_env_sustain = 0.1 + frnd(0.3);\n this.p_env_decay = 0.1 + frnd(0.2);\n if (rnd(1))\n this.p_hpf_freq = frnd(0.3);\n if (rnd(1))\n this.p_lpf_freq = 1 - frnd(0.6);\n return this;\n}\n\nParams.prototype.blipSelect = function () {\n this.wave_type = rnd(1);\n if (this.wave_type === SQUARE)\n this.p_duty = frnd(0.6);\n else\n this.p_duty = 1;\n this.p_base_freq = 0.2 + frnd(0.4);\n this.p_env_attack = 0;\n this.p_env_sustain = 0.1 + frnd(0.1);\n this.p_env_decay = frnd(0.2);\n this.p_hpf_freq = 0.1;\n return this;\n}\n\nParams.prototype.synth = function () {\n this.wave_type = rnd(1);\n this.p_base_freq = [0.2723171360931539, 0.19255692561524382, 0.13615778746815113][rnd(2)];\n this.p_env_attack = rnd(4) > 3 ? frnd(0.5) : 0;\n this.p_env_sustain = frnd(1);\n this.p_env_punch = frnd(1);\n this.p_env_decay = frnd(0.9) + 0.1;\n this.p_arp_mod = [0, 0, 0, 0, -0.3162, 0.7454, 0.7454][rnd(6)];\n this.p_arp_speed = frnd(0.5) + 0.4;\n this.p_duty = frnd(1);\n this.p_duty_ramp = rnd(2) == 2 ? frnd(1) : 0;\n this.p_lpf_freq = [1, 0.9 * frnd(1) * frnd(1) + 0.1][rnd(1)];\n this.p_lpf_ramp = rndr(-1, 1);\n this.p_lpf_resonance = frnd(1);\n this.p_hpf_freq = rnd(3) == 3 ? frnd(1) : 0;\n this.p_hpf_ramp = rnd(3) == 3 ? frnd(1) : 0;\n return this;\n}\n\nParams.prototype.tone = function () {\n this.wave_type = SINE;\n this.p_base_freq = 0.35173364; // 440 Hz\n this.p_env_attack = 0;\n this.p_env_sustain = 0.6641; // 1 sec\n this.p_env_decay = 0;\n this.p_env_punch = 0;\n return this;\n}\n\nParams.prototype.click = function() {\n const base = [\"explosion\", \"hitHurt\"][rnd(1)];\n this[base]();\n if (rnd(1)) {\n this.p_freq_ramp = -0.5 + frnd(1.0);\n }\n if (rnd(1)) {\n this.p_env_sustain = (frnd(0.4) + 0.2) * this.p_env_sustain;\n this.p_env_decay = (frnd(0.4) + 0.2) * this.p_env_decay;\n }\n if (rnd(3) == 0) {\n this.p_env_attack = frnd(0.3);\n }\n this.p_base_freq = 1 - frnd(0.25);\n this.p_hpf_freq = 1 - frnd(0.1);\n return this;\n}\n\nParams.prototype.random = function () {\n this.wave_type = rnd(3);\n if (rnd(1))\n this.p_base_freq = cube(frnd(2) - 1) + 0.5;\n else\n this.p_base_freq = sqr(frnd(1));\n this.p_freq_limit = 0;\n this.p_freq_ramp = Math.pow(frnd(2) - 1, 5);\n if (this.p_base_freq > 0.7 && this.p_freq_ramp > 0.2)\n this.p_freq_ramp = -this.p_freq_ramp;\n if (this.p_base_freq < 0.2 && this.p_freq_ramp < -0.05)\n this.p_freq_ramp = -this.p_freq_ramp;\n this.p_freq_dramp = Math.pow(frnd(2) - 1, 3);\n this.p_duty = frnd(2) - 1;\n this.p_duty_ramp = Math.pow(frnd(2) - 1, 3);\n this.p_vib_strength = Math.pow(frnd(2) - 1, 3);\n this.p_vib_speed = rndr(-1, 1);\n this.p_env_attack = cube(rndr(-1, 1));\n this.p_env_sustain = sqr(rndr(-1, 1));\n this.p_env_decay = rndr(-1, 1);\n this.p_env_punch = Math.pow(frnd(0.8), 2);\n if (this.p_env_attack + this.p_env_sustain + this.p_env_decay < 0.2) {\n this.p_env_sustain += 0.2 + frnd(0.3);\n this.p_env_decay += 0.2 + frnd(0.3);\n }\n this.p_lpf_resonance = rndr(-1, 1);\n this.p_lpf_freq = 1 - Math.pow(frnd(1), 3);\n this.p_lpf_ramp = Math.pow(frnd(2) - 1, 3);\n if (this.p_lpf_freq < 0.1 && this.p_lpf_ramp < -0.05)\n this.p_lpf_ramp = -this.p_lpf_ramp;\n this.p_hpf_freq = Math.pow(frnd(1), 5);\n this.p_hpf_ramp = Math.pow(frnd(2) - 1, 5);\n this.p_pha_offset = Math.pow(frnd(2) - 1, 3);\n this.p_pha_ramp = Math.pow(frnd(2) - 1, 3);\n this.p_repeat_speed = frnd(2) - 1;\n this.p_arp_speed = frnd(2) - 1;\n this.p_arp_mod = frnd(2) - 1;\n return this;\n}\n\nParams.prototype.mutate = function () {\n if (rnd(1)) this.p_base_freq += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_freq_ramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_freq_dramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_duty += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_duty_ramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_vib_strength += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_vib_speed += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_vib_delay += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_env_attack += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_env_sustain += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_env_decay += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_env_punch += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_lpf_resonance += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_lpf_freq += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_lpf_ramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_hpf_freq += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_hpf_ramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_pha_offset += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_pha_ramp += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_repeat_speed += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_arp_speed += frnd(0.1) - 0.05;\n if (rnd(1)) this.p_arp_mod += frnd(0.1) - 0.05;\n return this;\n}\n\n/*** Simpler namespaced functional API ***/\n\nsfxr = {};\n\nsfxr.toBuffer = function(synthdef) {\n return (new SoundEffect(synthdef)).getRawBuffer()[\"buffer\"];\n};\n\nsfxr.toWebAudio = function(synthdef, audiocontext) {\n var sfx = new SoundEffect(synthdef);\n var buffer = sfx.getRawBuffer()[\"normalized\"];\n if (audiocontext) {\n var buff = audiocontext.createBuffer(1, buffer.length, sfx.sampleRate);\n var nowBuffering = buff.getChannelData(0);\n for (var i = 0; i < buffer.length; i++) {\n nowBuffering[i] = buffer[i];\n }\n var proc = audiocontext.createBufferSource();\n proc.buffer = buff;\n return proc;\n }\n};\n\nsfxr.toWave = function(synthdef) {\n return (new SoundEffect(synthdef)).generate();\n};\n\nsfxr.toAudio = function(synthdef) {\n return sfxr.toWave(synthdef).getAudio();\n}\n\nsfxr.play = function(synthdef) {\n return sfxr.toAudio(synthdef).play();\n}\n\nsfxr.b58decode = function(b58encoded) {\n var decoded = function(S,A){var d=[],b=[],i,j,c,n;for(i in S){j=0,c=A.indexOf(S[i]);if(c<0)return undefined;c||b.length^i?i:b.push(0);while(j in d||c){n=d[j];n=n?n*58+c:c;c=n>>8;d[j]=n%256;j++}}while(j--)b.push(d[j]);return new Uint8Array(b)}(b58encoded,b58alphabet);\n var result = {};\n for (var pi in params_order) {\n var p = params_order[pi];\n var offset = (pi - 1) * 4 + 1;\n if (p == \"wave_type\") {\n result[p] = decoded[0];\n } else {\n var val = (decoded[offset] | (decoded[offset + 1] << 8) | (decoded[offset + 2] << 16) | (decoded[offset + 3] << 24));\n result[p] = numberToFloat(val);\n }\n }\n return result;\n}\n\nsfxr.b58encode = function(synthdef) {\n var p = new Params();\n p.fromJSON(synthdef);\n return p.toB58();\n}\n\nsfxr.generate = function(algorithm, options) {\n const p = new Params();\n const opts = options || {};\n p.sound_vol = opts[\"sound_vol\"] || 0.25;\n p.sample_rate = opts[\"sample_rate\"] || 44100;\n p.sample_size = opts[\"sample_size\"] || 8;\n return p[algorithm]();\n}\n\n/*** Main entry point ***/\n\nfunction SoundEffect(ps) {\n if (typeof(ps) == \"string\") {\n var PARAMS = new Params();\n if (ps.indexOf(\"#\") == 0) {\n ps = ps.slice(1);\n }\n ps = PARAMS.fromB58(ps);\n }\n this.init(ps);\n}\n\nSoundEffect.prototype.init = function (ps) {\n this.parameters = ps;\n this.initForRepeat(); // First time through, this is a bit of a misnomer\n\n // Waveform shape\n this.waveShape = parseInt(ps.wave_type);\n\n // Filter\n this.fltw = Math.pow(ps.p_lpf_freq, 3) * 0.1;\n this.enableLowPassFilter = (ps.p_lpf_freq != 1);\n this.fltw_d = 1 + ps.p_lpf_ramp * 0.0001;\n this.fltdmp = 5 / (1 + Math.pow(ps.p_lpf_resonance, 2) * 20) *\n (0.01 + this.fltw);\n if (this.fltdmp > 0.8) this.fltdmp=0.8;\n this.flthp = Math.pow(ps.p_hpf_freq, 2) * 0.1;\n this.flthp_d = 1 + ps.p_hpf_ramp * 0.0003;\n\n // Vibrato\n this.vibratoSpeed = Math.pow(ps.p_vib_speed, 2) * 0.01;\n this.vibratoAmplitude = ps.p_vib_strength * 0.5;\n\n // Envelope\n this.envelopeLength = [\n Math.floor(ps.p_env_attack * ps.p_env_attack * 100000),\n Math.floor(ps.p_env_sustain * ps.p_env_sustain * 100000),\n Math.floor(ps.p_env_decay * ps.p_env_decay * 100000)\n ];\n this.envelopePunch = ps.p_env_punch;\n\n // Flanger\n this.flangerOffset = Math.pow(ps.p_pha_offset, 2) * 1020;\n if (ps.p_pha_offset < 0) this.flangerOffset = -this.flangerOffset;\n this.flangerOffsetSlide = Math.pow(ps.p_pha_ramp, 2) * 1;\n if (ps.p_pha_ramp < 0) this.flangerOffsetSlide = -this.flangerOffsetSlide;\n\n // Repeat\n this.repeatTime = Math.floor(Math.pow(1 - ps.p_repeat_speed, 2) * 20000\n + 32);\n if (ps.p_repeat_speed === 0)\n this.repeatTime = 0;\n\n this.gain = Math.exp(ps.sound_vol) - 1;\n\n this.sampleRate = ps.sample_rate;\n this.bitsPerChannel = ps.sample_size;\n}\n\nSoundEffect.prototype.initForRepeat = function() {\n var ps = this.parameters;\n this.elapsedSinceRepeat = 0;\n\n this.period = 100 / (ps.p_base_freq * ps.p_base_freq + 0.001);\n this.periodMax = 100 / (ps.p_freq_limit * ps.p_freq_limit + 0.001);\n this.enableFrequencyCutoff = (ps.p_freq_limit > 0);\n this.periodMult = 1 - Math.pow(ps.p_freq_ramp, 3) * 0.01;\n this.periodMultSlide = -Math.pow(ps.p_freq_dramp, 3) * 0.000001;\n\n this.dutyCycle = 0.5 - ps.p_duty * 0.5;\n this.dutyCycleSlide = -ps.p_duty_ramp * 0.00005;\n\n if (ps.p_arp_mod >= 0)\n this.arpeggioMultiplier = 1 - Math.pow(ps.p_arp_mod, 2) * .9;\n else\n this.arpeggioMultiplier = 1 + Math.pow(ps.p_arp_mod, 2) * 10;\n this.arpeggioTime = Math.floor(Math.pow(1 - ps.p_arp_speed, 2) * 20000 + 32);\n if (ps.p_arp_speed === 1)\n this.arpeggioTime = 0;\n}\n\nSoundEffect.prototype.getRawBuffer = function () {\n var fltp = 0;\n var fltdp = 0;\n var fltphp = 0;\n\n var noise_buffer = Array(32);\n for (var i = 0; i < 32; ++i)\n noise_buffer[i] = Math.random() * 2 - 1;\n\n var envelopeStage = 0;\n var envelopeElapsed = 0;\n\n var vibratoPhase = 0;\n\n var phase = 0;\n var ipp = 0;\n var flanger_buffer = Array(1024);\n for (var i = 0; i < 1024; ++i)\n flanger_buffer[i] = 0;\n\n var num_clipped = 0;\n\n var buffer = [];\n var normalized = [];\n\n var sample_sum = 0;\n var num_summed = 0;\n var summands = Math.floor(44100 / this.sampleRate);\n\n for(var t = 0; ; ++t) {\n\n // Repeats\n if (this.repeatTime != 0 && ++this.elapsedSinceRepeat >= this.repeatTime)\n this.initForRepeat();\n\n // Arpeggio (single)\n if(this.arpeggioTime != 0 && t >= this.arpeggioTime) {\n this.arpeggioTime = 0;\n this.period *= this.arpeggioMultiplier;\n }\n\n // Frequency slide, and frequency slide slide!\n this.periodMult += this.periodMultSlide;\n this.period *= this.periodMult;\n if(this.period > this.periodMax) {\n this.period = this.periodMax;\n if (this.enableFrequencyCutoff)\n break;\n }\n\n // Vibrato\n var rfperiod = this.period;\n if (this.vibratoAmplitude > 0) {\n vibratoPhase += this.vibratoSpeed;\n rfperiod = this.period * (1 + Math.sin(vibratoPhase) * this.vibratoAmplitude);\n }\n var iperiod = Math.floor(rfperiod);\n if (iperiod < OVERSAMPLING) iperiod = OVERSAMPLING;\n\n // Square wave duty cycle\n this.dutyCycle += this.dutyCycleSlide;\n if (this.dutyCycle < 0) this.dutyCycle = 0;\n if (this.dutyCycle > 0.5) this.dutyCycle = 0.5;\n\n // Volume envelope\n if (++envelopeElapsed > this.envelopeLength[envelopeStage]) {\n envelopeElapsed = 0;\n if (++envelopeStage > 2)\n break;\n }\n var env_vol;\n var envf = envelopeElapsed / this.envelopeLength[envelopeStage];\n if (envelopeStage === 0) { // Attack\n env_vol = envf;\n } else if (envelopeStage === 1) { // Sustain\n env_vol = 1 + (1 - envf) * 2 * this.envelopePunch;\n } else { // Decay\n env_vol = 1 - envf;\n }\n\n // Flanger step\n this.flangerOffset += this.flangerOffsetSlide;\n var iphase = Math.abs(Math.floor(this.flangerOffset));\n if (iphase > 1023) iphase = 1023;\n\n if (this.flthp_d != 0) {\n this.flthp *= this.flthp_d;\n if (this.flthp < 0.00001)\n this.flthp = 0.00001;\n if (this.flthp > 0.1)\n this.flthp = 0.1;\n }\n\n // 8x oversampling\n var sample = 0;\n for (var si = 0; si < OVERSAMPLING; ++si) {\n var sub_sample = 0;\n phase++;\n if (phase >= iperiod) {\n phase %= iperiod;\n if (this.waveShape === NOISE)\n for(var i = 0; i < 32; ++i)\n noise_buffer[i] = Math.random() * 2 - 1;\n }\n\n // Base waveform\n var fp = phase / iperiod;\n if (this.waveShape === SQUARE) {\n if (fp < this.dutyCycle)\n sub_sample=0.5;\n else\n sub_sample=-0.5;\n } else if (this.waveShape === SAWTOOTH) {\n if (fp < this.dutyCycle)\n sub_sample = -1 + 2 * fp/this.dutyCycle;\n else\n sub_sample = 1 - 2 * (fp-this.dutyCycle)/(1-this.dutyCycle);\n } else if (this.waveShape === SINE) {\n sub_sample = Math.sin(fp * 2 * Math.PI);\n } else if (this.waveShape === NOISE) {\n sub_sample = noise_buffer[Math.floor(phase * 32 / iperiod)];\n } else {\n throw \"ERROR: Bad wave type: \" + this.waveShape;\n }\n\n // Low-pass filter\n var pp = fltp;\n this.fltw *= this.fltw_d;\n if (this.fltw < 0) this.fltw = 0;\n if (this.fltw > 0.1) this.fltw = 0.1;\n if (this.enableLowPassFilter) {\n fltdp += (sub_sample - fltp) * this.fltw;\n fltdp -= fltdp * this.fltdmp;\n } else {\n fltp = sub_sample;\n fltdp = 0;\n }\n fltp += fltdp;\n\n // High-pass filter\n fltphp += fltp - pp;\n fltphp -= fltphp * this.flthp;\n sub_sample = fltphp;\n\n // Flanger\n flanger_buffer[ipp & 1023] = sub_sample;\n sub_sample += flanger_buffer[(ipp - iphase + 1024) & 1023];\n ipp = (ipp + 1) & 1023;\n\n // final accumulation and envelope application\n sample += sub_sample * env_vol;\n }\n\n // Accumulate samples appropriately for sample rate\n sample_sum += sample;\n if (++num_summed >= summands) {\n num_summed = 0;\n sample = sample_sum / summands;\n sample_sum = 0;\n } else {\n continue;\n }\n\n sample = sample / OVERSAMPLING * masterVolume;\n sample *= this.gain;\n\n // store the original normalized floating point sample\n normalized.push(sample);\n\n if (this.bitsPerChannel === 8) {\n // Rescale [-1, 1) to [0, 256)\n sample = Math.floor((sample + 1) * 128);\n if (sample > 255) {\n sample = 255;\n ++num_clipped;\n } else if (sample < 0) {\n sample = 0;\n ++num_clipped;\n }\n buffer.push(sample);\n } else {\n // Rescale [-1, 1) to [-32768, 32768)\n sample = Math.floor(sample * (1<<15));\n if (sample >= (1<<15)) {\n sample = (1 << 15)-1;\n ++num_clipped;\n } else if (sample < -(1<<15)) {\n sample = -(1 << 15);\n ++num_clipped;\n }\n buffer.push(sample & 0xFF);\n buffer.push((sample >> 8) & 0xFF);\n }\n }\n \n return {\n \"buffer\": buffer,\n \"normalized\": normalized,\n \"clipped\": num_clipped,\n }\n}\n\nSoundEffect.prototype.generate = function() {\n var rendered = this.getRawBuffer();\n var wave = new RIFFWAVE();\n wave.header.sampleRate = this.sampleRate;\n wave.header.bitsPerSample = this.bitsPerChannel;\n wave.Make(rendered.buffer);\n wave.clipping = rendered.clipped;\n wave.buffer = rendered.normalized;\n wave.getAudio = _sfxr_getAudioFn(wave);\n return wave;\n}\n\nvar _actx = null;\nvar _sfxr_getAudioFn = function(wave) {\n return function() {\n // check for procedural audio\n var actx = null;\n if (!_actx) {\n if ('AudioContext' in window) {\n _actx = new AudioContext();\n } else if ('webkitAudioContext' in window) {\n _actx = new webkitAudioContext();\n }\n }\n actx = _actx;\n \n if (actx) {\n var buff = actx.createBuffer(1, wave.buffer.length, wave.header.sampleRate);\n var nowBuffering = buff.getChannelData(0);\n for (var i=0;i= 0 ? 1.0 - Math.pow(v, 2) * 0.9 : 1.0 + Math.pow(v, 2) * 10; },\n p_arp_speed: function (v) { return (v === 1.0) ? 0 :\n Math.floor(Math.pow(1.0 - v, 2.0) * 20000 + 32)},\n\n p_duty: function (v) { return 0.5 - v * 0.5; },\n p_duty_ramp: function (v) { return -v * 0.00005 },\n\n p_repeat_speed: function (v) { return (v === 0) ? 0 :\n Math.floor(Math.pow(1-v, 2) * 20000) + 32 },\n\n p_pha_offset: function (v) { return (v < 0 ? -1 : 1) * Math.pow(v,2)*1020 },\n p_pha_ramp: function (v) { return (v < 0 ? -1 : 1) * Math.pow(v,2) },\n\n p_lpf_freq: function (v) { return Math.pow(v, 3) * 0.1 },\n p_lpf_ramp: function (v) { return 1.0 + v * 0.0001 },\n p_lpf_resonance: function (v) { return 5.0 / (1.0 + Math.pow(v, 2) * 20) }, // * (0.01 + fltw);\n\n p_hpf_freq: function (v) { return Math.pow(v, 2) * 0.1 },\n p_hpf_ramp: function (v) { return 1.0 + v * 0.0003 },\n\n sound_vol: function (v) { return Math.exp(v) - 1; }\n};\n\nvar sliders_inverse = {\n p_env_attack: function (v) { return Math.sqrt(v / 100000.0); },\n p_env_sustain: function (v) { return Math.sqrt(v / 100000.0); },\n p_env_punch: function (v) { return v; },\n p_env_decay: function (v) { return Math.sqrt(v / 100000.0); },\n\n p_base_freq: function (v) { return Math.sqrt(v * 100 / 8 / 44100 - 0.001); },\n p_freq_limit: function (v) { return Math.sqrt(v * 100 / 8 / 44100 - 0.001); },\n p_freq_ramp: function (v) { return Math.cbrt((1.0 - v) / 0.01); },\n p_freq_dramp: function (v) { return Math.cbrt(v / -0.000001); },\n\n p_vib_speed: function (v) { return Math.sqrt(v / 0.01); },\n p_vib_strength: function (v) { return v / 0.5; },\n\n p_arp_mod: function (v) {\n return v < 1 ? Math.sqrt((1.0 - v) / 0.9) : -Math.sqrt((v - 1.0) / 10.0);\n },\n p_arp_speed: function (v) { return (v === 0) ? 1.0 :\n ( (1.0 - Math.sqrt((v - (v < 100 ? 30 : 32)) / 20000)))},\n\n p_duty: function (v) { return (v - 0.5) / -0.5; },\n p_duty_ramp: function (v) { return v / -0.00005 },\n\n p_repeat_speed: function (v) { return v === 0 ? 0 : -(Math.sqrt((v - 32) / 20000) - 1.0) },\n\n p_pha_offset: function (v) { return (v < 0 ? -1 : 1) * Math.sqrt(Math.abs(v) / 1020) },\n p_pha_ramp: function (v) { return (v < 0 ? -1 : 1) * Math.sqrt(Math.abs(v)) },\n\n p_lpf_freq: function (v) { return Math.cbrt(v / 0.1); },\n p_lpf_ramp: function (v) { return (v - 1.0) / 0.0001; },\n p_lpf_resonance: function (v) { return Math.sqrt((1.0 / (v / 5.0) - 1) / 20) },\n\n p_hpf_freq: function (v) { return Math.sqrt(v / 0.1); },\n p_hpf_ramp: function (v) { return (v - 1.0) / 0.0003; },\n sound_vol: function (v) { return Math.log(v + 1);; }\n}\n\n// convert from internal representation to domain value without units\n\nvar domain = {\n p_env_attack: function (v) { return (v / 44100); },\n p_env_sustain: function (v) { return (v / 44100); },\n p_env_punch: function (v) { return (v * 100); },\n p_env_decay: function (v) { return (v / 44100); },\n\n p_base_freq: function (v) { return v; },\n p_freq_limit: function (v) { return v; },\n p_freq_ramp: function (v) { return (44100*Math.log(v)/Math.log(0.5)); },\n p_freq_dramp: function (v) { return (v*44100 / Math.pow(2, -44101./44100)); },\n\n p_vib_speed: function (v) { return (441000/64. * v); },\n p_vib_strength: function (v) { return (v*100); },\n\n p_arp_mod: function (v) { return (1./v); },\n p_arp_speed: function (v) { return (v / 44100); },\n\n p_duty: function (v) { return (100 * v); },\n p_duty_ramp: function (v) { return (8 * 44100 * v); },\n\n p_repeat_speed: function (v) { return v === 0 ? 0 : (44100./v); },\n\n p_pha_offset: function (v) { return (1000*v/44100); },\n p_pha_ramp: function (v) { return (1000*v); },\n\n p_lpf_freq: function (v) { return (v === .1) ? 0 : 8 * 44100 * v / (1-v); },\n p_lpf_ramp: function (v) { return Math.pow(v, 44100); },\n p_lpf_resonance: function (v) { return (100*(1-v*.11));},\n\n p_hpf_freq: function (v) { return 8 * 44100 * v / (1-v); },\n p_hpf_ramp: function (v) { return Math.pow(v, 44100); },\n\n sound_vol: function (v) { return 10 * Math.log(v*v) / Math.log(10); }\n}\n\nvar domain_inverse = {\n p_env_attack: function (v) { return (v * 44100); },\n p_env_sustain: function (v) { return (v * 44100); },\n p_env_punch: function (v) { return (v / 100); },\n p_env_decay: function (v) { return (v * 44100); },\n\n p_base_freq: function (v) { return v; },\n p_freq_limit: function (v) { return v; },\n p_freq_ramp: function (v) { return Math.exp(Math.log(0.5) * v / 44100); },\n p_freq_dramp: function (v) { return v * Math.pow(2, -44101./44100) / 44100; },\n\n p_vib_speed: function (v) { return (64. / 441000) * v; },\n p_vib_strength: function (v) { return (v / 100); },\n\n p_arp_mod: function (v) { return (1. / v); },\n p_arp_speed: function (v) { return (v * 44100); },\n\n p_duty: function (v) { return (v / 100); },\n p_duty_ramp: function (v) { return (v / (8 * 44100)); },\n\n p_repeat_speed: function (v) { return v <= 0 ? 0 : v > 1378 ? 32 : (44100 / v); },\n\n p_pha_offset: function (v) { return (v / 1000) * 44100; },\n p_pha_ramp: function (v) { return (v / 1000); },\n\n p_lpf_freq: function (v) { return (v / (v + 8 * 44100)); },\n p_lpf_ramp: function (v) { return Math.pow(v, 1 / 44100); },\n p_lpf_resonance: function (v) { return (1 - v / 100) / .11; },\n\n p_hpf_freq: function (v) { return (v / (v + 8 * 44100)); },\n p_hpf_ramp: function (v) { return Math.pow(v, 1 / 44100); },\n\n sound_vol: function (v) { return Math.sqrt(Math.pow(10, v / 10)); }\n}\n\n// convert from internal representation to printable units\n\nvar units = {\n p_env_attack: function (v) { return (v / 44100).toPrecision(4) + ' sec' },\n p_env_sustain: function (v) { return (v / 44100).toPrecision(4) + ' sec' },\n p_env_punch: function (v) { return '+' + (v * 100).toPrecision(4) + '%'},\n p_env_decay: function (v) { return (v / 44100).toPrecision(4) + ' sec' },\n \n p_base_freq: function (v) { return v.toPrecision(4) + 'Hz' },\n p_freq_limit: function (v) { return v.toPrecision(4) + 'Hz' },\n p_freq_ramp: function (v) { \n return (44100*Math.log(v)/Math.log(0.5)).toPrecision(4) + ' 8va/sec'; },\n p_freq_dramp: function (v) { \n return (v*44100 / Math.pow(2, -44101./44100)).toExponential(3) +\n ' 8va/s^2'; },\n\n p_vib_speed: function (v) { return v === 0 ? 'OFF' : \n (441000/64. * v).toPrecision(4) + ' Hz'},\n p_vib_strength: function (v) { return v === 0 ? 'OFF' : \n '± ' + (v*100).toPrecision(4) + '%' },\n\n p_arp_mod: function (v) { return ((v === 1) ? 'OFF' : \n 'x ' + (1./v).toPrecision(4)) },\n p_arp_speed: function (v) { return (v === 0 ? 'OFF' :\n (v / 44100).toPrecision(4) +' sec') },\n\n p_duty: function (v) { return (100 * v).toPrecision(4) + '%'; },\n p_duty_ramp: function (v) { return (8 * 44100 * v).toPrecision(4) +'%/sec'},\n\n p_repeat_speed: function (v) { return v === 0 ? 'OFF' : \n (44100/v).toPrecision(4) + ' Hz' },\n\n p_pha_offset: function (v) { return v === 0 ? 'OFF' :\n (1000*v/44100).toPrecision(4) + ' msec' },\n // Not so sure about this:\n p_pha_ramp: function (v) { return v === 0 ? 'OFF' :\n (1000*v).toPrecision(4) + ' msec/sec' },\n\n p_lpf_freq: function (v) { \n return (v === .1) ? 'OFF' : Math.round(8 * 44100 * v / (1-v)) + ' Hz'; },\n p_lpf_ramp: function (v) { if (v === 1) return 'OFF';\n return Math.pow(v, 44100).toPrecision(4) + ' ^sec'; },\n p_lpf_resonance: function (v) { return (100*(1-v*.11)).toPrecision(4)+'%';},\n\n p_hpf_freq: function (v) { \n return (v === 0) ? 'OFF' : Math.round(8 * 44100 * v / (1-v)) + ' Hz'; },\n p_hpf_ramp: function (v) { if (v === 1) return 'OFF';\n return Math.pow(v, 44100).toPrecision(4) + ' ^sec'; },\n\n sound_vol: function (v) { \n v = 10 * Math.log(v*v) / Math.log(10);\n var sign = v >= 0 ? '+' : '';\n return sign + v.toPrecision(4) + ' dB'; \n }\n};\n\n/*** Plumbing ***/\n\n(function (root, factory) {\n if(typeof define === \"function\" && define.amd) {\n // Now we're wrapping the factory and assigning the return\n // value to the root (window) and returning it as well to\n // the AMD loader.\n define([\"./riffwave\"], function(RIFFWAVE){\n return (root.jsfxr = factory(RIFFWAVE));\n });\n } else if(typeof module === \"object\" && module.exports) {\n // I've not encountered a need for this yet, since I haven't\n // run into a scenario where plain modules depend on CommonJS\n // *and* I happen to be loading in a CJS browser environment\n // but I'm including it for the sake of being thorough\n RIFFWAVE = require(\"./riffwave.js\");\n module.exports = (root.jsfxr = factory(RIFFWAVE));\n } else {\n root.jsfxr = factory(root.RIFFWAVE);\n }\n}(this, function(RIFFWAVE) {\n // module code here....\n return {\n \"sfxr\": sfxr,\n \"convert\": {\n \"sliders\": sliders,\n \"domain\": domain,\n \"sliders_inverse\": sliders_inverse,\n \"domain_inverse\": domain_inverse,\n \"units\": units,\n },\n \"parameters\": {\n \"order\": params_order,\n \"signed\": params_signed,\n },\n \"Params\": Params,\n \"SoundEffect\": SoundEffect,\n \"waveforms\": {\n \"SQUARE\": SQUARE,\n \"SAWTOOTH\": SAWTOOTH,\n \"SINE\": SINE,\n \"NOISE\": NOISE\n }\n };\n}));\n"]}