Just got an iRig cheap at GC - $20 new. I need an app that will allow me to easily play and practice along with music on my iPhone. I tried Garageband, and it doesn't allow me to go to the music player easily and rewind, etc. while playing - it cuts off my bass and I have to tap the Garageband app icon again to hear my bass - this is annoying. I basically want to just hear my bass while I am fiddling with the music player - nothing fancy, hopefully decent sounding. Thanks in advance for your help.