Aspiring composers may be interested to know that the Raffin company
now offers a system for playing digital music on most of their models
without disturbing the roll playing capability.  This is accomplished
by installing a solenoid-operated valve for each note.

Regrettably, the computer hardware provided is rather expensive, but it
does include a MIDI input as well as playing proprietary "black boxed"
music.  I saw a demonstration this summer using a small "off the shelf"
MIDI player as input and it worked quite well.

Anyone interested in more information should contact me privately.
If there is sufficient interest I'll post photographs on my web site:
http://www.raffinorgans.com/

Hal O'Rourke

 [ Who supplies the proprietary music, Hal, and what's the quality
 [ of the transcriptions?  When using the external MIDI capability,
 [ does the music speed follow the cranking speed, so that playing
 [ the MIDI files emulates cranking a music roll?  -- Robbie