I just purchased the R7 for the purpose of acting solely as a transport for my office system (MyTek Brooklyn Bridge Dac > Kinki Studio Integrated Amp > Bonickie W5SE speakers) . What attracted me to the R7 is that I can use all streaming services and especially Roon Arc, which permits me to stream my 4000 album collection from my Roon Core at home to my office system. As a result of using Roon Arc on the R7 in my office, I now have access to everything I also have at home instantly in the office. This is a great use of the android based R7 in my view; however, I am having a technical issue.
When I connected the R7 to the MyTek dac I needed to enable the beta driver for the R7 to feed the MyTek dac hi resolution files. Absent using the driver, everything streamed with Roon Arc for example was down sampled. That all worked fine with the driver, but seems to have created my technical issue.
I switch between Sirius XM, Qobuz, Roon Arc and other sources of music/programing during the day. I have determined that once I use Roon Arc as my source on the R7, the R7 essentially locks out the USB’s output for every other app/source. In other words, once I play music using Roon Arc (and Tidal), when I switch to Sirius XM, there is no sound, and the MyTek dac is not receiving a digital stream, but the Sirius app is running on the R7 and is working properly. The same thing happens when I play any other app after Roon Arc or Tidal (each of these apps ask for permission to use the external dac. If I grant permission, I get the locking out behavior. If I don’t grant permission, the R7 down samples all music from Roon Arc. If I play Sirius, then switch to Roon Arc, Roon Arc will play and properly if I grant permission, but then I cannot return to Sirius XM or any other app unless I power down the R7. Even closing Roon Arc doesn’t “unlock” and free the usb output from the control or either Roon Arc or the OS.
Does anyone know how to fix this issue. I did extensive testing and am sure Fiio can recreate it.
