After some testing, I can confirm the Motu mk5 lite functions amazingly well connected to a Ubuntu RPI4 bridge endpoint.
I used: ubuntu-21.04-preinstalled-server-arm64+raspi.img
With my 3 way crossover running, the DAC changes sample rates inline with source content perfectly. No clicks or pops, no need to fix the sample rate. This observation is consistent with either Windows 10/Roon server or Roon Rock feeding the Ubuntu RPI4 endpoint.
- Just a quick update, I installed Roon Rock, on my NUC series 4 i5, and tested a direct USB to MOTU connection. I get sync on the DAC, but no audio comes out (Crossover and USB mix routing was identical to the working Win10 Roon server preset). This points to a Kernel compatibility/Functionality issue in Roon Rock.
Anyway, as previously highlighted using my Ubuntu RPI4 as a Roon endpoint, everthing just works.
Tested with 8 active outputs, routed from the Roon mix function.