Hi @Thomas_Ankner,
Did you try the EarlyAccess release we just posted here: Roon 2.0 Build 1297 and ARC Build 200 is Live! - #2? Or are you referring to a previous build?
We’ve included improvements to Android USB DAC issues on the most recent release and we are calibrating the fix.
@Jonathan_Black, please also try installing the Early Access version.
You can read more details here: https://community.roonlabs.com/t/roon-arc-build-182-crashing-with-certain-usb-dacs-on-android-investigating/245237/35
iFi DACs have a separate and potentially subsidiary issue that you’re experiencing here. We have a separate tracked ticket - keep in mind EarlyAccess may not fully resolve your issue, but it may improve it, and it will help us further resolve the problem. Your participation is optional but much appreciated.