IIgs demo available?

[Greg Dunn <gregdunn@indy.net>]

Waaaay back in the 80s I remember seeing a IIgs demo disk that ran a
continuous graphics/sound pageant with very impressive hi-res and
synthesized/sampled jazz music excerpts.  It seemed to be an Apple
dealer demo of some kind, since it didn't ship with the machine.

Does aynone know whether this demo is online for download anywhere? 
I'm very curious to see if it's as impressive today as it seemed when
my Mac only had b/w graphics and 4-voice sound. :-)