MP3 to MIDI converter: convert any recorded music into MIDI. WIDI Recognition System is capable of converting polyphonic stereo audio files (MP3, WAV, and CD) to MIDI in several seconds. A wide range of presets for different kinds of music is available. WIDI Recognition System is also capable of converting music on the fly, as you play the instruments. Moreover, WIDI comes with a TrueTone editor for MIDI rearrangement and bar-line positioning.