MOTU UltraLite-mk5 and Linux on Raspberry Pi 4: noise on unused channels

[grizaudio (Stephen)]

My new observations running Ubuntu 21.04 server, with Roon server installed.

Low Level Crackling - Clock issues?

UPDATED… Sorry I have updated a few times, as I observe issues. OK, So I took the time to install Ubuntu Server 21.04 on a Series 4 i5 laptop. uname -r = 5.11.0-36-generic I then installed Roon Server. All observations are with the Motu Mk5 lite connected to the Roon server via USB: (Please bear in mind with the Motu directly connected to my RPI4, everything works perfectly) Test 1: Stereo When I set the device as 2.0, and downmix, Stereo works, but I get noise on unused channels. I did …