|I think the only personal files that are saved are in the My Documents folders. If the music was elsewhere then you may have wiped it out.|
You could try a recovery program to see if any can be retrieved.
Look below for some programs.
PC Inspector (freeware)
Zero assumption Recovery
The demo is limited
It will only recover 'up to' four folders per run
But you can make multiple runs
IMO the best, but not free
You could also try to use recuva. I am not sure if it will work in this instance but may be worth a try.