More on Fav Designs

[Don Tillman]

   From: Paul Schreiber <synth1 at airmail.net>
   Date: Thu, 17 Apr 1997 19:22:43 -0000

   Hot Damn! Some intelligent activity in a group (there is hope).

We *can* put a stop to that.  :-)

   VCOs

   First, no VCO has a "sound", sterile or otherwise. They may have THD, =
   but a pulse is a square is a saw. But what they DO have is drift and =
   have linearity errors.

Okay, others have jumped on this with some valid points, but I'd like
to add a couple of my own.

  The triangle wave output on a VCO that derrives it from a 
  sawtooth is likely going to sound different than a VCO with 
  a native triangle wave. 

  Various sawtooth resetting circuits will sound different, 
  the Chroma's change pump design might be the most unusual.

  Different VCO architectures will respond to control voltage 
  transients differently.  For example, an oscillating VCF.

And JDM mentioned various syncing schemes, through-zero FM, PWM
and VCWaveshaping.

I'll claim that if you can't hear differences between VCOs then you
are being entirely uncreative in your choice of VCOs!

  -- Don