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First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com

Answer 8 · Act 14 · Transact 2 · Score: Not yet scored

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set_modulation

act imperative

Add, update, remove, or clear modulation routes in the shared 32-slot matrix. `add` takes `source`+`destination` and replaces any route on that pair; `update`/`remove` address a route by `slot` or by that same pair — never both, and a pair with no route is an error, not a new route. `depth` is bipolar (-1..1): added to the destination's normalized 0..1 value, then clamped, so depth 0.5 on a parameter at 0.5 sweeps it to 1.0. Example: {"action":"add","source":"lfo1","destination":"filter1.cutoff","depth":0.4}

Input schema

Property	Type	Required	Description
`action`	string	yes	—
`source`	string	no	Source id: env1, env2, env3, env4, env5, env6, lfo1, lfo2, lfo3, lfo4, lfo5, lfo6, lfo7, lfo8, velocity, keytrack, random, macro1, macro2, macro3, macro4, modwheel, pitchwheel, aftertouch. Required by `add`; on `update`/`remove` it pairs with `destination` instead of `slot`.
`destination`	string	no	Moddable parameter id (`mod` in the compact schema). Required by `add`; pairs with `source` on `update`/`remove`.
`depth`	number	no	—
`enabled`	boolean	no	—
`slot`	integer	no	Matrix slot from `route.slot`; the alternative to a `source`+`destination` pair on `update`/`remove` — passing both is ambiguous.

Raw JSON schema

{
  "type": "object",
  "properties": {
    "action": {
      "type": "string",
      "enum": [
        "add",
        "update",
        "remove",
        "clear"
      ]
    },
    "source": {
      "type": "string",
      "description": "Source id: env1, env2, env3, env4, env5, env6, lfo1, lfo2, lfo3, lfo4, lfo5, lfo6, lfo7, lfo8, velocity, keytrack, random, macro1, macro2, macro3, macro4, modwheel, pitchwheel, aftertouch. Required by `add`; on `update`/`remove` it pairs with `destination` instead of `slot`."
    },
    "destination": {
      "type": "string",
      "description": "Moddable parameter id (`mod` in the compact schema). Required by `add`; pairs with `source` on `update`/`remove`."
    },
    "depth": {
      "type": "number",
      "minimum": -1,
      "maximum": 1
    },
    "enabled": {
      "type": "boolean"
    },
    "slot": {
      "type": "integer",
      "minimum": 0,
      "maximum": 31,
      "description": "Matrix slot from `route.slot`; the alternative to a `source`+`destination` pair on `update`/`remove` — passing both is ambiguous."
    }
  },
  "required": [
    "action"
  ],
  "additionalProperties": false
}