Confused about how to improve my audio system!

That was a brief honeymoon. Combining the Liberty DAC with the USB port of the RoPieee box seems to have done something bad. It will play for two or three songs, then the DAC goes into some error mode and has to be power-cycled to get it to work again. Back to the Mac Mini as endpoint.

Update: Apparently this is some kind of Roon/RoonBridge bug with XMOS chipsets and Linux: