Skip to content
OtterVoiceOtterVoice

Expo / React Native

Example: examples/react-native-expo

Full binding: expo-adapters.ts.

Terminal window
cd examples/react-native-expo
cp .env.example .env
bun run start

Shape

Section titled “Shape”

Preferred input: 16 kHz · mono · PCM16. The runtime does not depend on Expo packages; you inject small adapters:

import { createExpoRuntime } from '@ottervoice/runtime-react-native';
import { createVoiceSession } from '@ottervoice/core';


const runtime = createExpoRuntime({
  input: { /* Expo AudioStream / recorder bindings */ },
  output: { /* AudioPlaylist / playback bindings */ },
});


const session = createVoiceSession({
  mode: 'full_duplex',
  pipeline: 'audio_llm',
  audioLlmStartTiming: 'after_audio', // Run final caption ASR in parallel.
  runtime,
  providers: { asr, llm, audioLlm },
});

Dual delivery:

  • delivery: 'stream' — small PCM buffers → streaming ASR
  • delivery: 'turn' — complete WAV → batch ASR / Audio LLM

Use audioLlmStartTiming: 'after_audio' for the lowest speech-to-speech latency. The compatible default, after_asr_final, avoids starting a paid reply request until authoritative caption ASR confirms the turn.

Suspend encoded capture during assistant playback while keeping volume callbacks for barge-in. See runtime-react-native.