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A synthesizer you control by talking to AI.

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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analyze_reference_audio

act imperative

Step 1 of matching a target sound: send the target as Base64 audio, decoded in memory and analyzed with the same metrics as synth output. `pitch` is detected automatically and `harmonics`/`harmonicShape` come with it, so the target's partials are visible on the same terms as your own. Its PCM is retained (one at a time) for analyze_audio({source:"reference"}). Then call compare_audio (step 2), which renders the candidate for you.

Input schema

Property	Type	Required	Description
`audioBase64`	string	yes	—
`name`	string	no	—
`mimeType`	string	no	—
`f0Hz`	number	no	Known target fundamental; overrides detection when it reports the wrong octave.
`trimStartMs`	number	no	Milliseconds dropped from the start (leading silence).
`trimEndMs`	number	no	Milliseconds dropped from the end. What survives is the reference.
`windows`	integer	no	Spectral windows, default 4.
`format`	string	no	Default "json"; "text" adds the same metrics as a compact table.

Raw JSON schema

{
  "type": "object",
  "properties": {
    "audioBase64": {
      "type": "string",
      "minLength": 1,
      "maxLength": 16777216
    },
    "name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 255
    },
    "mimeType": {
      "type": "string",
      "minLength": 1,
      "maxLength": 127,
      "pattern": "^[aA][uU][dD][iI][oO]/"
    },
    "f0Hz": {
      "type": "number",
      "exclusiveMinimum": 0,
      "maximum": 20000,
      "description": "Known target fundamental; overrides detection when it reports the wrong octave."
    },
    "trimStartMs": {
      "type": "number",
      "minimum": 0,
      "description": "Milliseconds dropped from the start (leading silence)."
    },
    "trimEndMs": {
      "type": "number",
      "minimum": 0,
      "description": "Milliseconds dropped from the end. What survives is the reference."
    },
    "windows": {
      "type": "integer",
      "minimum": 4,
      "maximum": 32,
      "description": "Spectral windows, default 4."
    },
    "format": {
      "type": "string",
      "enum": [
        "json",
        "text"
      ],
      "description": "Default \"json\"; \"text\" adds the same metrics as a compact table."
    }
  },
  "required": [
    "audioBase64"
  ],
  "additionalProperties": false
}