Recipe catalog / sound-match

Check a patch against a requested sound

Does the patch or preset described in patch deliver the sound character asked for in request?

You are building a preset browser, sound search, or patch recommender and need to check whether a candidate patch description actually delivers what the user asked for before showing or loading it.

Explore this recipe interactively · Source and implementation guide

Use sound-match in TypeScript

Install with npm install jev-recipes. Requires Node.js 22.9 or newer and ES modules. Set TYPESAFE_API_KEY in your server environment for live calls, which send input to TypeSafe and use API quota. See the installation guide.

import { soundMatch } from 'jev-recipes/sound-match';

const result = await soundMatch({
  "request": "A warm analog-style pad with a slow attack and some gentle movement, for the intro of a downtempo track.",
  "patch": "Preset: Dusk Pad. Two sawtooth oscillators detuned 9 cents, one octave down sub sine at -12 dB. 24 dB low-pass filter, cutoff at 35 percent with a slow envelope adding 20 percent over 2 seconds. Amp envelope: attack 1.6 s, decay 0.5 s, sustain 100 percent, release 3.2 s. Slow triangle LFO at 0.15 Hz on filter cutoff, depth 8 percent. Stereo chorus and a long hall reverb at 30 percent mix.",
  "minConfidence": 0.8
});
console.log(result);

Input contract

{
  "input": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "request": {
        "type": "string"
      },
      "patch": {
        "type": "string"
      },
      "minConfidence": {
        "type": "number",
        "minimum": 0,
        "maximum": 1
      }
    },
    "required": [
      "request",
      "patch"
    ]
  },
  "result": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "model": {
        "type": "string"
      },
      "usage": {
        "type": "object",
        "properties": {
          "input_tokens": {
            "type": "integer",
            "minimum": 0,
            "maximum": 9007199254740991
          },
          "output_tokens": {
            "type": "integer",
            "minimum": 0,
            "maximum": 9007199254740991
          }
        },
        "required": [
          "input_tokens",
          "output_tokens"
        ],
        "additionalProperties": false
      },
      "status": {
        "type": "string",
        "enum": [
          "ready",
          "review"
        ]
      },
      "probability": {
        "type": "number",
        "minimum": 0,
        "maximum": 1
      },
      "confidence": {
        "type": "number",
        "minimum": 0,
        "maximum": 1
      },
      "verdict": {
        "type": "string",
        "enum": [
          "matches",
          "mismatched"
        ]
      }
    },
    "required": [
      "model",
      "usage",
      "status",
      "probability",
      "confidence",
      "verdict"
    ],
    "additionalProperties": false
  }
}

Saved example result

This hand-authored response demonstrates the contract. It is not a model accuracy measurement. Run it without an API key: npx jev-recipes demo sound-match.

{
  "model": "demo-fixture",
  "usage": {
    "input_tokens": 0,
    "output_tokens": 0
  },
  "status": "ready",
  "probability": 0.92,
  "confidence": 0.92,
  "verdict": "matches"
}

Evaluation evidence

Use the evaluation guide to measure this decision on your own labeled cases.

Limitations

• Judges the patch as described in text, not as it sounds. A description can be inaccurate or incomplete, and parameter values only imply a sound.
• A mismatched verdict does not say which quality is missing or how to adjust the patch.
• Does not consider the synth, plugin, or sample library the patch needs, or whether the user has it.

Related recipes

• product-match: Use product-match to check a product listing against a shopping request, rather than a synth patch against a described sound.
• audience-fit: Use audience-fit to judge whether content suits a described audience, rather than whether a patch produces a described sound.