Mix with a babble speech sample to simulate background conversation.
Uses the bundled babble.wav by default, or reads from backgroundAudio path.
volume scales the babble gain (default 0.3) — symmetric with
backgroundNoise (review n1). NOTE: the Python twin
(python/scenario/voice/effects/noise.py:multiple_voices) does not yet expose
this param; the default preserves identical behaviour, and adding the same
volume arg to Python is a tracked parity follow-up (out of scope for this
JS-only pass).
Mix with a babble speech sample to simulate background conversation. Uses the bundled
babble.wavby default, or reads frombackgroundAudiopath.volumescales the babble gain (default 0.3) — symmetric with backgroundNoise (review n1). NOTE: the Python twin (python/scenario/voice/effects/noise.py:multiple_voices) does not yet expose this param; the default preserves identical behaviour, and adding the samevolumearg to Python is a tracked parity follow-up (out of scope for this JS-only pass).