Andrew Taylor and others mentioned the need to play a pneumatic stack
from a computer.

I had mentioned a few weeks past that I had phoned Ken Caulkins, owner of
Ragtime Automated Music, about his AMICA-advertised 'Miniature MIDI Air
Valves' that actually fit in-line with your tracker bar tubing!

I have since received this information, a descriptive letter and a data
sheet describing their electrical and geometric properties.  I will scan
these into computer .GIF or .JPG formats Monday when I get into work, and
will be happy to mail these two images to anyone who requests them.  The
valves cost $5.00 each, and interface directly to a MIDI board.

Karl Ellison - Ashland, Massachusetts U.S.A.
KBEllison@aol.com - http://members.aol.com/kbellison/kbe.html

 [ Thanks, Karl.  Please send the large image files to kravitz@foxtail.com
 [ so that Jody can place them in the MMD Archives.  -- Robbie