Your kidding me right, What fool would want to play a" part" of a song? Boy how entertaining that would be. Look everybody, I can play the guitar part for "I just want to celebrate" It sound like crap by itself. And anyway,this is 2010 pal, most regular amps have aux in ,and pre amp outs, so you hook your mp3 player to the amp with the backing tracks, connect the pre outs to the sound board and their you have it A band ready for any open mic fun. but without the backing tracks, you sit at home thinking "I coulda been a somebody"