Time ago I've searched a bit and I have to say that the technology related to wave to midi conversion is really undeveloped.
There are no good tools for wav (mp3, ogg, etc...) to midi conversion (at least freeware).
You can give a try to use REAPER's plugin ReaGate.
Also as freeware go there is amazingmidi
http://www.pluto.dti.ne.jp/araki/amazingmidi/
But, really, the results are kind of awful. If you want a good midi you have to normally do it yourself.