Links

Pianola / Disklavier

http://pianola.org
http://www.boesendorfer.com
http://www.linuxfordevices.com/c/a/News/Digital-piano-adds-Linux
http://en.wikipedia.org/wiki/Piano_roll
http://www.scribd.com/doc/7236995/Composite
http://www.yamaha.com/Products/Disklavier

Conlon Nancarrow

http://www.kylegann.com/index2.html

MIDI instruments

http://www.decap.be
http://www.huygens-fokker.org/instrumenten/fokkerorgel.html