{
  "id": "sidechain_pump",
  "name": "Sidechain Pump",
  "description": "A reusable sidechain 'pump' envelope CHOP, mirroring create_sidechain_pump: a kick-style driver is shaped by a Lag CHOP (attack/release) and clamped to [0,1] by a Limit CHOP, ending in a Null CHOP you bind targets to. Here an lfoCHOP ramp stands in for a kick so it previews offline; for a real set, swap the driver for a selectCHOP isolating a beat/onset channel. After import, bind a target parameter's value to an expression like rest * (1 - depth * op('pump')['kick']) so it ducks on every beat (manual-wire — RecipeSchema parameters take constants only). Fills the sidechain-pump gap. Offline-validated against RecipeSchema; UNVERIFIED pending live cook-check.",
  "tags": ["audio-reactive", "sidechain", "pump", "chop", "modulation", "controls"],
  "difficulty": "intermediate",
  "td_version_min": "2022",
  "nodes": [
    {
      "name": "driver",
      "type": "lfoCHOP",
      "parameters": {
        "type": "ramp",
        "frequency": 2,
        "amp": 1,
        "offset": 0,
        "channelname": "kick"
      },
      "comment": "Stand-in kick driver (2 Hz sawtooth). Swap for a selectCHOP isolating a beat/onset channel for a live set."
    },
    {
      "name": "lag",
      "type": "lagCHOP",
      "parameters": { "lagunit": "seconds", "lag1": 0.002, "lag2": 0.18 },
      "comment": "Envelope shaping: fast attack (lag1), slow release (lag2) — the classic pump release tail."
    },
    {
      "name": "clamp",
      "type": "limitCHOP",
      "parameters": { "type": "clamp", "min": 0, "max": 1 },
      "comment": "Constrain the envelope to [0,1] so it is safe to multiply into any parameter."
    },
    {
      "name": "pump",
      "type": "nullCHOP",
      "comment": "Stable output handle — bind targets to op('pump')['kick']."
    }
  ],
  "connections": [
    { "from": "driver", "to": "lag" },
    { "from": "lag", "to": "clamp" },
    { "from": "clamp", "to": "pump" }
  ],
  "controls": [
    {
      "name": "Attack",
      "type": "float",
      "min": 0,
      "max": 0.5,
      "default": 0.002,
      "bind_to": ["lag.lag1"]
    },
    {
      "name": "Release",
      "type": "float",
      "min": 0,
      "max": 1.0,
      "default": 0.18,
      "bind_to": ["lag.lag2"]
    }
  ],
  "preview_description": "A CHOP utility, not an image: a 0..1 envelope that snaps up on each beat and decays with an adjustable release tail — bind it into any parameter to make the whole look breathe with the kick."
}