Shephard-generator - what is that ?

[Ray Peck]

Tim Cockram writes:
>The barbers pole is a great alusion to the audiable effect, 

At the last CCRMA concert (a couple weeks ago), a David Jaffe piece
was performed on Disklavier (Yamaha MIDI controlled grand piano).  It
featured the baber's effect on piano!  He had a little motif/scale
which ran down in pitch, and was done simultaneously in several
octaves.  The bottom octave would fade out as the top octave was
fading in, and it had just this effect.  It was *damn* cool to hear on
a piano!