{
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    {"level": 0.2, "db": -30.5},
    {"level": 0.3, "db": -25.5},
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    {"level": 0.5, "db": -18.0},
    {"level": 0.6, "db": -15.0},
    {"level": 0.7, "db": -11.5},
    {"level": 0.8, "db":  -8.5},
    {"level": 0.9, "db":  -5.0},
    {"level": 1.0, "db":   0.0}
  ],
  "input_devices": [
    {
      "device_id": [
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      ],
      "supported_stream_types": [
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      "rate": 48000,
      "software_gain_db": 20.0
    },
    {
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      "supported_stream_types": [
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    }
  ]
}