The Midifile-Optimizer Pro is an easy and fast MIDI file editor. The Optimizer has an intelligent transpose function that gives you the best results even at extreme ranges. Changing the Instrument and its variations, volumes, hall, tempo, and chorus are just one click away. Other highlights are the drums editor, normalize, copy or delete range, and fade-out. Version 4.9.1 may include unspecified updates, enhancements, or bug fixes.