In fact, if you want to
change BGM
volume, invert the camera,
change video settings, etc., you'll have to wait till the game auto - saves, quit the game, go back to the title screen, make your
changes, reenter your saved game, and mash your way through the
repeated cutscenes until you're finally allowed to jump back into where you left off.
Music also shows up
in the Cortana interface on your devices, where you can play, pause, go back and forth between tracks,
change the
volume, and choose shuffle and
repeat.