[popcornmix]

I've gone back and forth several times now between e85b566 (last commit on 7 Nov) and 18a163f (10 Nov) and only getting "chirping" with 18a163f. It appears this commit resolves several problems, not sure which one might be the underlying cause of the audio glitches (which seem to be PCM related).

Thanks for searching. There's one change with a config option you can test. Add this to config.txt (with "chirping" firmware)

Code:

hdmi_dma_waits=7

Any different?

If not I may have to produce a few test builds to narrow it down further.