I could possibly be having a mental lapse, but I swear in 6.0.2 and before, when I opened the audio editor on a part and hit the space bar, it would play with all of the accompanying tracks.
If I hit the play button at the top, it would play just the audio in the audio editor, but bypass all effects (note: this hasn’t changed).
What I wanted was to be able to play the audio with the effects engaged, but nothing else.
This is what I have now in Cubase 6.0.3. I didn’t notice it in the release notes.
But now I can tune my vocals, and still hear my vocal effects chain, but all other tracks are muted when i hit the space bar to start playback while the audio editor is in the foreground.