Pitch Correction

[47hao]

Hi! I'm looking to modify the playcanvas engine such that the set pitch function only changes the playback rate of sounds, and keeps its pitch, so I can speed up and slow down sounds without changing their pitches.

I saw documentation here that says playbackRate pitch corrects audio by default, but am not sure whether this is the implementation playcanvas uses.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/playbackRate

Accordingly I've gone through the playcanvas source code, commenting/disabling code that changes the pitch and keeping the changes to playbackrate.

I've also found that changing _pitch and pitch variables does not seem to have an effect on the actual sound pitch.

Any pointers/helpful information on this would be appreciated!

[willeastcott]

@vkalpias wrote the audio subsystems. Any thoughts on this?

[47hao]

A little more digging makes it look more like playcanvas uses the AudioBufferSourceNode interface instead. Is this the case?

[vkalpias]

Hi - PlayCanvas uses AudioBufferSourceNode internally if it's supported otherwise it falls back to an <audio> element.

[vkalpias]

@vkalpias wrote the audio subsystems. Any thoughts on this?

Changing the pitch variable ends up changing the playbackRate of the audio source internally. Maybe pitch was the wrong name to use for this?