audio_mixer

Combine multiple audio inputs into a single mixed output. Idle channels are silenced via Zero Gain Optimization (GainNode.gain = 0) so the browser skips downstream DSP for tracks without audible signal.

Example

{
  "name": "mix_audio",
  "type": "audio_mixer",
  "inputs": ["room_src"],
  "config": {
    "sampleRate": 48000,
    "channels": 2,
    "audioLevels": { "enabled": true, "intervalMs": 200 }
  }
}

Config

Field	Type	Default	Description
sampleRate	int	48000	Output sample rate (snapped to 8k–48k)
channels	int	2	1 or 2
audioLevels	object	off	Per-participant volume reporting for clients

audioLevels

Field	Default	Description
enabled	false	Emit volume tiers to supporting sinks
intervalMs	200	Report interval
levels	5	Number of volume tiers (2–256)
floorDb	-50	Silence threshold

Pricing

$0.0005/min of actual processing time. Node pricing.