This is the application log
application.zip (5.7 KB)
What I did was a simple Dorico session.
- Start the application
- Load a sample project
- Play the piece for while
- Stop playback
- Close Project
- Exit Dorico
At that time audio output was hijacked, and other programs could not output any sound. (UR22C audio interface)
In process explorer there were no left-overs… no VSTAudioEngine, no Dorico, no MediaBay, nothing…
Then I tried to randomly terminate some threads that were in waiting state (bottom panel in ProcExp). At some point during that terminating threads, sound returned. I can’t pinpoint which entry may have caused it though 
Here are the waiting threads involved (hooked to the audiodg.exe process, that was guess of me)
Maybe this helps ?