Music making

As a musician, I want to write or arrange music in music notation using software like Sibelius so I can have the music played using MIDI on physical instruments.  Each note that is played has a written pitch including accidentals and octaves, a MIDI number, a channel number, and the note, effect, function, or sound that happens when that note is played.  A configuration listing a set of notes and their actions is defined in a table that I’m calling the MIDI Map. 

Here's an example of fields I envision for a MIDI map:

Written note

Self-playing mechanical instruments were controlled by holes in paper or pins on a cylinder (like your wind-up music box), so each vertical column represented one note or action that the instrument would take.  The layout of these vertical columns is called a "scale."