This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The renderedBuffer read-only property of the OfflineAudioCompletionEvent interface is an AudioBuffer containing the result of processing an OfflineAudioContext.
An AudioBuffer.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
renderedBuffer |
14 | 12 | 25 | 15 | 6 | 18 | 25 | 14 | 6 | 1.0 | 4.4 | 6 |
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https://developer.mozilla.org/en-US/docs/Web/API/OfflineAudioCompletionEvent/renderedBuffer