I have seen on Simtel announcement of "digital ear" that say
that it can transform AUDIO to MIDI with good quality.
Look at http://www.simtel.net/pub/pd/55886.shtml
http://www.simtel.net/pub/pd/55886.shtml
Does some one with more knowledge than me as tested it?
Yes, I've tried that one -- along with several others. It does work, to a degree, and might be useful for creating midis from relatively simple and clean input waves.
Digital Ear is better than some of them, in that it also "imports" dynamics and volume changes. The drawback is that the resulting midi can be very "busy", albeit somewhat more accurate than most of the simpler programs.
However, its best use (and the same goes for the others I've tried) is as a random-tone midi generator to give ideas for avant-garde aleatoric compositions. ;-)
Fred