@ottervoice/runtime-web

Browser runtime: encoded mic chunks, volume-based VAD, assistant playback, and encoded pre-roll until barge-in is confirmed.

import { createWebRuntime } from '@ottervoice/runtime-web';

const runtime = createWebRuntime({
  mimeType: 'audio/webm;codecs=opus',
  timesliceMs: 100,
  volumePollMs: 50,
  bargeInPreRollMs: 500,
});

WebRuntimeOptions

Option	Default	Notes
mimeType	Best available Opus/WebM	MediaRecorder MIME
timesliceMs	100	Encoded slice interval; streaming ASR can consume these
volumePollMs	50	RMS poll for VAD / barge-in
bargeInPreRollMs	500	Encoded pre-roll kept while filtering playback; released on confirmed barge-in
getUserMedia / mediaRecorder / …	Browser globals	Injectable for tests

You can also pass nested audioInput / audioOutput (WebAudioInputOptions / WebAudioOutputOptions).

Browser requirements

• HTTPS or localhost
• Request the mic (and try unlock playback) from a user gesture
• An autoplay-unlock rejection must not block input or ASR
• Call dispose() to release tracks, AudioContext, and the player

During assistant playback the runtime can pause encoded upload while still monitoring volume; only a confirmed barge-in releases pre-roll, preserving opening syllables and discarding ordinary speaker bleed.

Example: examples/web. Fields: API reference.