A bit off your topic, Squeak, but here is a site with some cool synth info...all about older instruments from the 70's....you may find it interesting; may not, but in any case, here's the link buddy.

http://www.cyndustries.com/synapse/intro.cfm
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.