Glad I stumbled upon this thread. I'm having the same issues - trying to stream Qobuz via the Zen Stream. I tried Roon, and it worked but only via the spdif output of the Zen, which in my system doesn't sound nearly as good as the USB, so Roon was out. I have mConnect HD now, and I can get it to access my Qobuz account, I can't get it to connect to the Zen Stream. I'm using a MacBook Air as my front end. Any helpful advice would be greatly appreciated. I'm new to streaming and to digital audio in general. Been an analog guy for quite a while.
Thanks,
Scott