Short description of MIDIFixer 1.0: MIDI Volume software MIDIFixer is a program that lets you edit volume levels in MIDI files. You can increase volume, normalize volume, turn off stuck notes, or change speed. If you use your computer to control a MIDI electronic piano or other device, then you may have noticed that some MIDI files have huge inappropriate dynamic ranges for your device. MIDIFixer will help you smooth out the volume levels in a MIDI file.