Short description of WIDI Recognition System Professional 4.03: Convert any recorded music into MIDI! WIDI Recognition System is capable of converting polyphonic stereo Audio files (MP3, Wave, CD) to MIDI in several seconds. A wide range of presets for different kinds of music are available. WIDI Recognition System is also capable of converting music on the fly, as you play the instruments. Moreover, WIDI comes with a unique TrueTone Editor with Score Viewer for MIDI rearrangement and bar-line positioning.