CocoaMIDI - Select a plain text input file in the format and save it as a MIDI file.

CocoaMIDI is a program I wrote because as a bass player I sometimes need to hear actual chords played so I can test out some new bass line. CocoaMIDI has you select a Plain Text input file in the format described below, and then has you save it as a MIDI file. It converts chords in the text file, such as "A" or "F#", into a MIDI file, including variable note length, volume, and key. CocoaMIDI is public domain. The source code and a tutorial on how to write it are available here.