what i want is a web site where i can download mp3 backing tracks of just music in any certain key that i can improvise over. i have tried googleing it but can only find ones for songs, not just simple progressions to improvise over.

so if anyone knows any sites it would be awsome if you could tell me. i woould make my own but my mixer is temporarily out of ordar and i ant record
thanx for your help.
thanx, those ones are quite slow though,
if anyone has ones that they have recorded themselves that would be awsome.
if you could somehow send it to me or let me download it from somewhere.