I also just noted that if you turn "mirrored" on and do the display switching, the music is still there. Nonetheless, I would like to have a "frame cap" for older computers where I can limit things to 60 or even 30 fps.
And … during video editing for my youtube channel I noticed that vsync seems to be off - even at 120 fps I had a "split screen" sometimes. So it would be nice to "force vsync".