[sdiy] filter bank and keyboard

[Martin Czech]

Well, I mentioned "a few voltage controled filters" would
do the job, but as you sayed, no "total" polyphony.

I mean with lots of independend channels you can simply lean
your arm on the keyboard, like a pianist would do, voila
30 channels turn on. No sustain cut away, no voice stealing.
Lots of reasons. And completely insane.

m.c.

:::From: "Steve Ridley" <spr at spridley.freeserve.co.uk>
:::To: "Martin Czech" <czech at Micronas.Com>
:::Subject: Re: [sdiy] filter bank and keyboard
:::Date: Mon, 12 Feb 2001 23:38:27 -0000
:::Content-Transfer-Encoding: 7bit
:::
:::> The KORG PS series shows that "one circuit for one key" approach can be
:::> done. Now, what about having (1st order approach) some keyboard with one
:::> distinct bandpass filter attached to each key, perhaps with velocity? Now
:::> one could play timbre melodies.
:::>
:::> Of course, the technical effort is close to ridiculous.  Could be done
:::> with a few voltage controlled filters as well, a hacked polysynth would
:::do.
:::>
:::> Any ideas, experiences?
:::
:::Martin
:::
:::Is there a good reason why you can't just use several bandpass VCFs
:::(maybe with a VCA and EG each) and assign them to a keyboard
:::(or Midi/CV) in the usual way?  It would probably be easier, and
:::portamento would become possible too - I think I would prefer to be
:::able to glide between timbres.
:::
:::It is insane, but I recently bought 100 CEM3396s in an auction at a
:::stupidly cheap price and have been thinking about total polyphony too.
:::
:::
:::Steve Ridley
:::
:::(A man who has just realised that he has more CEMs than fingers)
:::
:::
:::
:::