I have similar problems with usb audio. Sound crackles or is a bit distorted. Happens when amcodec acceleration is used. Even with the fixed version.
My box is the minim8s, S905, 2Gbit ram and 100mbit ethernet.
I think Kszaq wrote amlogic usb drivers aren't very good. But since the problems appear when using hardware video decoding, it might be something else.
Thank you for your info. Can the acceleration be disabled somehow for music playback as temp. solution?
Seems like usb audio is working for some people in Armbian/Ubuntu S905 builds based on C2 kernel.
I hope this problem could be fixed in the future LibreElec builds...
We need UAC2 (USB Audio Class 2) compliant kernel, Amlogic