Did something change in Web Audio API re AudioWorklet that affects playback?

[guest271314]

This https://guest271314.github.io/AudioWorkletStream/ (plnkr https://plnkr.co/edit/nECtUZ?preview) used to work on Firefox and Chromium. No longer plays back audio on Version 123.0.6279.0 (Developer Build) (64-bit), still plays audio on Firefox Nightly 124.0a1 (2024-02-03) (64-bit).

[guest271314]

channelCount: 2 no longer works for AudioWorkletNodeOptions on Chromium 123, outputChannelCount: [2, 2] does. Firefox 124 plays back with channelCount: 2 for AudioWorkletNodeOptions.

[guest271314]

AudioWorkletNode is an AudioNode per the specification. AudioNodes have a channelCount attribute https://webaudio.github.io/web-audio-api/#AudioNode-attributes however that appears to be inapplicable for the AudioWorkletNode.

I couldn't figure that out from the specification alone. I read some Stackoverflow questions and answers and rested to figure out outputChannelCount was necessary whre channelCount used to work.

It might be helpful to add a note to make it clear that channelCount is inapplicable for AudioWorkletNode, and outputChannelCount must be used to set N channels for disambiguity?

Thanks.

On Tue, Feb 13, 2024 at 3:51 PM Thomas Guilbert <tgui...@google.com> wrote:

Hello,

Yes there is a breakage, which is tracked by https://issues.chromium.org/issues/324293899#comment12.

Thanks for bringing this up,

Thomas

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