Audio to Midi Converter converts digitized music and mp3 into MIDI sequences - and unlike other programs it CAN process polyphonic music (that is having many tones or voices). What takes several hours of hard work even for a well-trained musician will be a matter of some few minutes for this software. It can operate in two recognition modes: off-line and real-time.
In off-line mode, it creates MIDI sequences from input files such as mp3s or audio CD tracks (MP3 to MIDI , CD to MIDI Converter). This gives you numerous possibilities:
upload your favorite melody to your web page
play it on your cell phone
use it in your MIDI instrument for training or for background
use it in a MIDI editor (and thus print your MIDI files as musical notation)
make a preview of your mp3 collection (saves traffic on your web site)
In real-time mode,it instantly converts music coming through microphone or line input of your computer into a MIDI sequence(Record sounds to MID). Think of this mode as a powerful music processor, which allows some non-MIDI instrument (like a guitar) to sound as a violin or a piano or whatever instrument you've got in your MID synthesizer.