I'm looking for a pedal on which I can download mp3 audio, so I can play it buy just stepping on the pedal. I plan on using it to play intro's, dialogue from old movies, ... at the start of some songs and in a bridge. Now, I took a look at the Boss RC-3 and digitech Jamman XT solo. Can these pedals do what I am looking for? I know they are actually loopers, but that would just be a bonus for me. Other pedals that can do this just fine, may be recommended. Help me out please, I can't seem to figuere out what I need to buy... Thanks.