Hey, I just found this out and thought it may be useful to anyone using appMobi to take their Impact game mobile.

If you want to have a soundtrack to your game, you can use the code below to be triggered when you want the music to start.

AppMobi.player.startAudio(relativeURL);

You could also give the player the option of pausing the music by placing a volume off button in the pause menu and have that button trigger this code:
AppMobi.player.toggleAudio();

We added this function to a couple of the games we've made and didn't see any change in the performance.

You can read more about how this code works in our API documentation found here:
http://appmobi.com/documentation/player.html

I hope this helps someone else :)

Stay classy developers!