Android Question Activity Modules & Looping sound

Hello,

I am wondering if there is a limit to the number of Activity Modules a project can have? Not that I am using an obscene amount just curious. Also how do i get bg music to loop. I understand the code to initialize and play a sound, but I want to have bg music loop on my Main Menu Screen for my game.

Thanks In Advance. This Forum and its members are extremely helpful!