Hi All,  Have you seen the automated Vorsetzer by the Logos Foundation
at http://www.logosfoundation.org/instrum_gwr/playerpiano.html
(I saw a reference to this site on the SchoberOrphans group on Yahoo
groups.)

It has theory, schematics and printed circuit board layouts on the
site, and a music composition language, <GMT>, is available also.
Examples of using this to write software for the Vorsetzer is there
also.  Wander around the web site for some interesting musical devices.

From the web page http://www.logosfoundation.org/kursus/2116.html :

  Important notice:  Copyright & Patents strictly prohibited.
  We herewith put both code and hardware design in the public domain
  and whoever patents or copyrights any of our inventions - thereby
  blocking scientific and artistic progress - or the outcomes
  thereof in any country, will be prosecuted.  These designs can be
  freely used on the only condition that their author be mentioned.

  Godfried-Willem Raes

Mickey Sadler
Dublin, Ohio

 [ The bank of solenoids sits above the piano keyboard, much like
 [ the QRS Playola keytop solenoid player attachment.  When rented
 [ for performances the system must be insured for 10,000 euros!
 [
 [ Dr. Raes, of Ghent, Belgium, is also a composer and performer
 [ of avant garde music.  His paper, "The absurdity of copyright",
 [ develops the premise that "information cannot be possessed; it is
 [ not property since it cannot be taken away."  The paper (in English)
 [ is at http://www.logosfoundation.org/copyleft/copyrigh.html
 [
 [ -- Robbie