stereo.dcm is a bootable disk containing two stereo demos from Europe 
(Poland I think).  They were sent to me a while back from a friend in 
Holland.  These Demos do not require upgraded machines, however.  They 
require TWO machines to be heard in stereo.  In each, you press and hold a 
number key on one machine and shift number on the other machine.  Release
both simultaneously to start the music.  They both sound (and look) good on 
a single machine, but there are just amazing when heard on two.

The Second one on the disk is also an incredible Graphics demo as well!

-A. Conover.