It is a free and open-source software for creating music and editing MIDI files. Here are the basic steps to edit MIDI files in Aria Maestosa: Download and install Aria Maestosa. Launch Aria Maestosa.

A MIDI sound file that contains MIDI messages. MIDI files have a .MID extension. A variation of this format is the RIFF MIDI file, which uses the .RMI extension. The format of a Standard MIDI File ...