Mimir/config/audio-field.example.json

{
  "sampleRate": 48000,
  "blockSize": 1024,
  "captureMode": "distributed-clocks",
  "capturePolicy": {
    "fieldSampleRate": 48000,
    "focusriteCalibrationSampleRate": 96000,
    "sampleFormat": "float32",
    "losslessCalibrationTransport": true,
    "preferredFocusriteHostApis": ["ASIO", "WASAPI exclusive", "WASAPI"],
    "note": "Focusrite ADCs are the high-quality dialogue anchors. Use the best available driver path for calibration and downsample/resample into the field timeline only after clock alignment."
  },
  "clockModel": {
    "referenceMicId": "mic_focusrite_local",
    "strategy": "calibration-ping-plus-adaptive-resampling",
    "requiresAlignmentBeforeEncoding": true,
    "maxExpectedSroPpm": 200,
    "latencyPolicy": {
      "mode": "bounded-buffered-realtime",
      "targetLatencyMs": 750,
      "maxLatencyMs": 2500,
      "convergesToRealtime": true,
      "dropOrStretchWhenBehind": "stretch-first-drop-only-on-overrun"
    },
    "runtimeSync": {
      "enabled": true,
      "speakerChirpletsAsTelemetry": true,
      "updateEveryBlock": true,
      "phaseFieldUpdate": "per-frame",
      "confidenceGate": {
        "minChirpletScore": 0.18,
        "freezeOnLowConfidence": true
      },
      "estimates": [
        "delay",
        "samplingRateOffset",
        "polarity",
        "phase"
      ],
      "activeProbeOptimization": {
        "enabled": true,
        "minIntervalMs": 1500,
        "maxProbeLevelDbfs": -18,
        "targetConfidence": 0.65,
        "probeWhenAnyAnchorBelow": 0.35,
        "preferMaskedWindows": true,
        "objective": "maximize sync confidence gain per audible intrusion"
      }
    }
  },
  "ambisonicBus": {
    "order": 1,
    "channelOrder": "ACN",
    "normalization": "SN3D",
    "channels": ["W", "Y", "Z", "X"]
  },
  "machines": [
    {
      "id": "local",
      "label": "OBS / calibration machine",
      "role": "receiver-calibration-host"
    },
    {
      "id": "neighbor",
      "label": "neighbor sender machine",
      "role": "remote-capture-host",
      "address": "192.168.1.84"
    }
  ],
  "microphones": [
    {
      "id": "mic_kiyo_left",
      "fieldChannel": 0,
      "label": "left Kiyo camera mic",
      "role": "spatial-context",
      "qualityPriority": 30,
      "machine": "local",
      "device": {"query": "Kiyo", "hostApi": "WASAPI", "channel": 0, "matchIndex": 0},
      "clockDomain": "kiyo_left_usb",
      "positionMeters": [-0.65, 0.8, 1.35],
      "orientationDeg": {"azimuth": 180.0, "elevation": 0.0},
      "directivity": "camera-mic",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "mic_kiyo_right",
      "fieldChannel": 1,
      "label": "right Kiyo camera mic",
      "role": "spatial-context",
      "qualityPriority": 30,
      "machine": "local",
      "device": {"query": "Kiyo", "hostApi": "WASAPI", "channel": 0, "matchIndex": 1},
      "clockDomain": "kiyo_right_usb",
      "positionMeters": [0.65, 0.8, 1.35],
      "orientationDeg": {"azimuth": 180.0, "elevation": 0.0},
      "directivity": "camera-mic",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "mic_ps_eye_left",
      "fieldChannel": 2,
      "label": "left PS Eye mic",
      "role": "spatial-context",
      "qualityPriority": 20,
      "machine": "local",
      "device": {"query": "USB Camera-B4.09.24.1", "hostApi": "WASAPI", "channel": 0, "matchIndex": 0},
      "clockDomain": "ps_eye_left_usb",
      "positionMeters": [-0.9, -0.2, 1.25],
      "orientationDeg": {"azimuth": 90.0, "elevation": 0.0},
      "directivity": "camera-mic",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "mic_ps_eye_right",
      "fieldChannel": 3,
      "label": "right PS Eye mic",
      "role": "spatial-context",
      "qualityPriority": 20,
      "machine": "local",
      "device": {"query": "USB Camera-B4.09.24.1", "hostApi": "WASAPI", "channel": 0, "matchIndex": 1},
      "clockDomain": "ps_eye_right_usb",
      "positionMeters": [0.9, -0.2, 1.25],
      "orientationDeg": {"azimuth": -90.0, "elevation": 0.0},
      "directivity": "camera-mic",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "mic_focusrite_local",
      "fieldChannel": 4,
      "label": "local Focusrite shielded cardioid",
      "role": "primary-dialogue-anchor",
      "qualityPriority": 100,
      "machine": "local",
      "device": {
        "query": "Scarlett",
        "hostApi": "WASAPI",
        "preferredHostApis": ["ASIO", "WASAPI"],
        "channel": 0,
        "preferredSampleRates": [96000, 48000]
      },
      "clockDomain": "focusrite_local_usb",
      "positionMeters": [0.0, 0.0, 1.2],
      "orientationDeg": {"azimuth": 0.0, "elevation": 0.0},
      "attachedMic": {
        "kind": "shielded cardioid",
        "target": "local host face"
      },
      "directivity": "cardioid",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "mic_focusrite_neighbor",
      "fieldChannel": 5,
      "label": "neighbor Focusrite shotgun on co-streamer",
      "role": "co-streamer-dialogue-anchor",
      "qualityPriority": 100,
      "machine": "neighbor",
      "device": {
        "query": "Scarlett",
        "hostApi": "WASAPI",
        "preferredHostApis": ["ASIO", "WASAPI"],
        "channel": 0,
        "preferredSampleRates": [96000, 48000]
      },
      "transport": {
        "kind": "SRT",
        "portOffset": 3,
        "codec": "flac_or_pcm_for_calibration",
        "role": "remote-dialogue-anchor"
      },
      "clockDomain": "focusrite_neighbor_usb",
      "positionMeters": [0.0, 2.0, 1.2],
      "orientationDeg": {"azimuth": 180.0, "elevation": 0.0},
      "attachedMic": {
        "kind": "shotgun",
        "target": "co-streamer / star"
      },
      "directivity": "shotgun",
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    }
  ],
  "outputDevice": {
    "query": "Scarlett",
    "hostApi": "WASAPI",
    "preferredHostApis": ["ASIO", "WASAPI"],
    "preferredSampleRates": [48000, 44100],
    "channels": 2,
    "machine": "local"
  },
  "speakers": [
    {
      "id": "speaker_left",
      "channel": 0,
      "label": "left calibration speaker",
      "machine": "local",
      "positionMeters": [-0.75, 1.2, 1.2],
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    },
    {
      "id": "speaker_right",
      "channel": 1,
      "label": "right calibration speaker",
      "machine": "local",
      "positionMeters": [0.75, 1.2, 1.2],
      "gainDb": 0.0,
      "delaySamples": 0,
      "polarity": 1
    }
  ],
  "calibration": {
    "sweepSeconds": 3.0,
    "recordTailSeconds": 1.0,
    "sweepStartHz": 80.0,
    "sweepEndHz": 18000.0,
    "levelDbfs": -18.0,
    "referenceMicId": "mic_focusrite_local"
  }
}