I have read through the Amp FAQ's (so much info there) but I have not come across this really basic question. My amp has two jacks for active and passive instruments. There is unfortunately no place to plug in an .mp3 player. Is there any reason why I can't plug an .mp3 in one jack and my bass in the other jack? Common sense tells me no problem, but common sense has failed me many time before. Any advice appreciated.