Hi, I checked the accordion scale on my 20-note paper roll organ.
Leaving off the 3 bass notes, it is a full 25-notes diatonic scale
played on the remaining 17 notes.  So this 22-note accordion would be
short 3 notes at the top.

I covered the 3 bass notes and played a couple tunes on what's left
and it sounds okay, but a little 'thin' without the bass accompaniment.

However, I looked at the picture Ben sent and it's clearly a 26-note
accordion -- from A# to C, just over 2 octaves.  And the 3 top notes
do not match the list the Ben sent. Does this mean that the MIDI
system ignores the bottom 4 notes (which are silent)? I'm confused!

Regards,
Craig Smith
Upstate New York