AudioDataEvent

The AudioDataEvent interface represents the audio data being streamed at the specified interval. The size of the buffer will depend on the sampleRate and encoding configuration. This buffer can be used for further processing.

Interface

export interface AudioDataEvent {
    data: string | ArrayBuffer // The audio data in the specified format
    position: number // The position in the stream
    fileUri: string // The URI of the audio file
    eventDataSize: number // The size of the event data
    totalSize: number // The total size of the recorded data
}

Data Field

The data field can be either a string or an ArrayBuffer:

• Native (Android/iOS): The data is a string representing the base64-encoded version of the audio binary. We use base64 encoding because we cannot directly access the raw audio data from Android or iOS.
• Web: The data is an ArrayBuffer containing the raw audio data.

Example Usage

import { useAudioRecorder } from '@siteed/expo-audio-stream';

const config = {
    onAudioStream: async (event: AudioDataEvent) => {
        console.log('Audio data:', event);
        // Process the audio data here
    },
};

const {
    startRecording,
} = useAudioRecorder({ debug: true });

const handleStart = async () => {
    const { granted } = await Audio.requestPermissionsAsync();
    if (granted) {
        await startRecording(config);
    }
};