{
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  "sample_rate": 44100,
  "channels": [
    {
      "type": "triangle",
      "frequency": { "start": 600, "end": 900 },
      "envelope": { "attack": 0.0, "decay": 0.0, "sustain": 0.0, "release": 0.035 },
      "volume": 0.2,
      "pan": 0.0
    }
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}