Don's interpolating scanner

[Don Tillman]

   Date: Sun, 3 Jan 1999 10:28:44 -0800 (PST)
   From: Don Tillman <don at till.com>

   The original Hammond Chorus uses, clearly, a circular scanner.

[don't leave it hanging, Don...]

While the Hammond Chorus uses a circular scanner, that's somewhat
deceptive -- the scanner inputs are connected mapping back and forth
across a line.  Specifically the delay line.  So there's no barber
pole effect going on there or anything like that.

A circular scanner would really win for waveform generation; the
waveform just rotates through 360 degrees with no glitch for a
sawtooth reset.  I'll suggest that a circular scanner with voltage
controlled transition shape and through-zero FM would be a mighty
impressive VCO module.  Hmmm....

  -- Don