Web Audio API

- REC

High-level JavaScript API for processing and synthesizing audio

Chrome

  1. 4 - 13: Not supported
  2. 14 - 33: Supported
  3. 34 - 107: Supported
  4. 108: Supported
  5. 109 - 111: Supported

Edge

  1. 12 - 106: Supported
  2. 107: Supported

Safari

  1. 3.1 - 5.1: Not supported
  2. 6 - 14: Supported
  3. 14.1 - 16.0: Supported
  4. 16.1: Supported
  5. 16.2 - TP: Supported

Firefox

  1. 2 - 24: Not supported
  2. 25 - 106: Supported
  3. 107: Supported
  4. 108 - 109: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 21: Supported
  3. 22 - 91: Supported
  4. 92: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 107: Supported

Safari on iOS

  1. 3.2 - 5.1: Not supported
  2. 6 - 14.4: Supported
  3. 14.5 - 16.0: Supported
  4. 16.1: Supported

Samsung Internet

  1. 4 - 18.0: Supported
  2. 19.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 72: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 107: Supported

Firefox for Android

  1. 106: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported

Not all browsers with support for the Audio API also support media streams (e.g. microphone input). See the getUserMedia/Streams API data for support for that feature.

Firefox versions < 25 support an alternative, deprecated audio API.

Chrome support went through some changes as of version 36.

Resources:
MDN Web Docs - Web Audio API
Polyfill to support Web Audio API in Firefox
Polyfill to enable Web Audio API through Firefox Audio Data api or flash
WebPlatform Docs