I have no issue going “public” on the support thread. I am running Roon version 1.4 build 294 both on my linux based music server as well as on my Ipad, which I use a a control. I donot know which version of linux is installed. The server is sort of custom build by Majstro audio (previously called Streaming4home, in Holland). I feed the data via a Tellurium silver USB cable into my BMC Audio DAC-Pre. With the latest update of Roon the options appeared to play back from the server directly to the Ipad and to my Apple TV unit, both are part of my home network set-up. Until four days ago this whole set-up ran perfectly, but then my normal pathway from the server, via ALSA and USB into my DAC does not function AND DOES NOT SHOW ANY MORE AS A ZONE/PLAYBACK option any more. Playing back to my Ipad and my Apple TV does funtion, but are crazy options for high quality playback. I cannot find how to restore/add my original and preferred playback option. I have rebooted the server & DAC multiple times, eithout any change. The Roon manual seems out-of-date, since the pages that pop up in the current Roon version are totally different from the ones described in the manual. Please get me up and running again.