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 - 130: Supported
  4. 131: Supported
  5. 132 - 134: Supported

Edge

  1. 12 - 130: Supported
  2. 131: Supported

Safari

  1. 3.1 - 5.1: Not supported
  2. 6 - 14: Supported
  3. 14.1 - 18.0: Supported
  4. 18.1: Supported
  5. 18.2 - TP: Supported

Firefox

  1. 2 - 24: Not supported
  2. 25 - 131: Supported
  3. 132: Supported
  4. 133 - 135: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 21: Supported
  3. 22 - 113: Supported
  4. 114: Supported

IE

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

Chrome for Android

  1. 131: Supported

Safari on iOS

  1. 3.2 - 5.1: Not supported
  2. 6 - 14.4: Supported
  3. 14.5 - 18.0: Supported
  4. 18.1: Supported
  5. 18.2: Supported

Samsung Internet

  1. 4 - 25: Supported
  2. 26: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 131: Supported

Firefox for Android

  1. 132: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: 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