Inherits Reference < Object
device_id is an opaque ma_device_id blob from Context.devices (DeviceInfo#id); nil = the default capture device.
device_id
Stop (if running) and free the device. Idempotent.
Bytes accumulated since the last drain, s16le PCM (empty slice when nothing new). Never blocks — safe on the UI frame thread.
Bytes waiting right now (level meters, tests).