Procedural Audio

[Marc_Audy]

@noobwhisperer;156537

The “clicking sound” seems to be coming from a delay whenever the buffer is drained and the GeneratePCMData method is called to re-fill the buffer. If I set this to a much higher value I still hear the click but of course at much larger intervals. (8192 corresponds to 186ms for 44100 sample rate).

I think I’m implementing this system the way UE4 would expect. Is there a way to get rid of this delay (e.g. it should ultimately be fetching the data sooner and double buffering somewhere behind the scenes) ?

There is a double buffer system. You can see it initialized in FXAudio2SoundSource::SubmitPCMRTBuffers (or FCoreAudioSoundSource) and then it gets replenished in HandleRealTimeSource as needed. If you’re getting a consistent click regardless of changing the size of the buffer I would assume that you have a discontinuity in the data you’re putting in to the array which results in the click.