Audio MP3 to MIDI Converter - Version 4.0 Audio MP3 to MIDI Converter converts digitized music 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 TS-AudioToMIDI. TS-AudioToMIDI can operate in two recognition modes: off-line and real-time.