Up until this afternoon the Ultra was working fine, other then Chromecast being very flaky. Then about an hour ago I was listening to a record, with the Line Out connected from my McIntosh preamp to my McIntosh amp, and the sound disappeared. I've been using the Ultra as a remote control for when I have it hooked up like this, with my pre connected through it's Tape Out into the Ultra's Line In, and the Line Out connected to the pre's Tape In. And then I engage the pre's Tape Monitor switch so that I can control volume through the Ultra. Was working fine and then no sound. Played around with different settings, and eventually the sound came back. But then I lost it again. Connected the amp to the Line Out, and still no sound. Going to reboot but this is really disturbing.