http://www.midi.org/about-midi/tutorial/tutor.shtml
http://www.borg.com/~jglatt/tech/mmc.htm
RS422
Tutorial http://www.arcelect.com/rs422.htm
MIDI>RS422
Converter
http://www.syncsystems.com/products/pc1.html
RS422
Interface
http://www.precidia.com/products/product4.html
More
Converters
http://www.bb-europe.com/rs422chart.asp
http://www.viktoria.se/fal/publications/2002/soniccitydemo_uist02.pdf