Contribute correction: MIDI Tracker (unreleased)

 _    _     ______     _____     ___    
| \  / ||  /_   _//   / ___//   / _ \\  
|  \/  ||   -| ||-    \___ \\  | / \ || 
| .  . ||   _| ||_    /    //  | \_/ || 
|_|\/|_||  /_____//  /____//    \___//  
`-`  `-`   `-----`  `-----`     `---`