Well, let's see...a Yamaha S900, a old Yamaha CS-01 analog synth, and a Toshiba laptop.
[I also have a Tyros3 and a P85 digital piano, but they are on loan from Yamaha.]
With just the S900 and laptop, I can make CDs or record MP3s for e-mailing to friends.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.