what is a spectrum follower?

[Michael Peters <mpeters@csi.com>]

Who knows what a spectrum follower does, where one can get one, and how 
expensive it is? Apparently such a device was extensively used by Wendy 
Carlos in the early seventies, as can be read in the liner notes of the 
awesome Clockwork Orange rerelease.

*       Michael Peters: mpeters@csi.com
*       escape veloopity:       electronic guitar loop 
music:  http://listen.to/michaelpeters