ok thx for the tips, i will try audacity now and will edit then for say the result.

i tried to convert to my .mid to .wav yesterday with an online converter but i got something like 17mo for a 7ko mid oO

hope i can convert mid to ogg with audacity.
and tx for the last info about mid :l

edit damn, both in normal quality take too much space, i will try to find a way to do it with mid -.

re-edit : i finally did it, not with a converter but with a direct record with audacity, cause looks like he has some problem with mid..