expo-av — Audio recording

A robust, cross-platform API for capturing and managing high-fidelity audio recordings in React Native apps.

The expo-av library delivers a unified interface for audio capture through the Audio.Recording class. It handles the heavy lifting: managing system permissions, configuring RecordingOptions (presets like HIGH_QUALITY), and generating files in standard formats (.m4a or .caf). You get precise control over technical specs: sample rates (up to 44,100 Hz) and bitrates (up to 128 kbps) allow you to optimize for either storage or clarity. Once recorded, files integrate directly with expo-file-system for cloud uploads or immediate playback.

https://docs.expo.dev/versions/latest/sdk/audio/