For carousel band organs that play 125 rolls as MIDI files, here
is a program that will eliminate the need to use the 125 paper roll
for tuning your carousel band organ.

The program can use either the Ames, Stinson/Ames or the Johnson
MIDI codes to tune the carousel band organ.  There is a button lock
feature to keep a note playing once a particular note button is
pressed.  In addition, the MIDI output device can be selected (e.g.
USB to MIDI cable).

The program will run on Windows XP to Windows 10 operating systems.
The program is written in Visual Basic 6 and can be downloaded for
free at http://www.kptware.com/ 

David Stevens