Vocoder Idea

[Don Tillman]

   From: Martin Czech <martin.czech at intermetall.de>
   Date: Fri, 5 Jun 1998 09:50:34 +0200 (MET DST)

   > So the VC-bandpass will perform a frequency sweep
   > of the "voice" signal, which is sampled by each VCA at the time
   > corresponding to the freq of that VCA matching the freq of the bandpass.
   > 

   I have the impression that this channel saving trick won't work.
   The analysis filter needs some time to measure the incomming
   spectrum correctly, and this time is inverse proportional to the
   filter frequency (Fourier Theory). This would mean that the filter
   has to stay very long at the lowest frequencys in order to run in,
   so the overall analysis response will be very slow.

You could use separate fixed filters for the lowest frequency bands,
the slow guys, and sweep the rest.

  -- don