1. Web
  2. Web APIs
  3. AudioData
  4. AudioData()

AudioData: AudioData() constructor

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Note: This feature is available in Dedicated Web Workers.

The AudioData() constructor creates a new AudioData object which represents an individual audio sample.

Syntax

js
new AudioData(init)

Parameters

init

An object containing the following:

format

One of:

  • "u8"
  • "s16"
  • "s32"
  • "f32"
  • "u8-planar"
  • "s16-planar"
  • "s32-planar"
  • "f32-planar"
sampleRate

A decimal containing the sample rate in Hz.

numberOfFrames

An integer containing the number of frames in this sample.

numberOfChannels

An integer containing the number of channels in this sample.

timestamp

An integer indicating the data's time in microseconds.

data

A typed array of the audio data for this sample.

transfer

An array of ArrayBuffers that AudioData will detach and take ownership of. If the array contains the ArrayBuffer backing data, AudioData will use that buffer directly instead of copying from it.

Exceptions

TypeError

Thrown if init is in an incorrect format.

Specifications

Specification
WebCodecs
# dom-audiodata-audiodata

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
AudioData() constructor
Chrome – Full support
Chrome 94 (Release date: 2021-09-21)
footnote Full support
Edge – Full support
Edge 94 (Release date: 2021-09-24)
footnote Full support
Firefox – Full support
Firefox 130 (Release date: 2024-09-03)
footnote Full support
Opera – Full support
Opera 80 (Release date: 2021-10-05)
footnote Full support
Safari – Full support
Safari 26 (Release date: 2025-09-15)
footnote Full support
Chrome Android – Full support
Chrome Android 94 (Release date: 2021-09-21)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 66 (Release date: 2021-12-15)
footnote Full support
Safari on iOS – Full support
Safari on iOS 26 (Release date: 2025-09-15)
footnote Full support
Samsung Internet – Full support
Samsung Internet 17 (Release date: 2022-05-04)
footnote Full support
WebView Android – Full support
WebView Android 94 (Release date: 2021-09-21)
footnote Full support
WebView on iOS – Full support
WebView on iOS 26 (Release date: 2025-09-15)
footnote Full support

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Full support
No support

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