Yes basically. For listen to Music - i would do it like this: (i'm still assuming two home pages with a modification)

If the end user chooses a Listen to Music from the Main Home Page then if they want to change the activity - to say a Video Activity, then I'd have a button reference a third home page when all the audio sources would remain on but the video activities would send power and delays. From the video activities then would reference the second home page where all the activities would not have power on or delays.

Make sense? Its basically getting your page jumps to perform correctly.

D