To use CEM or not.

[Andrew Schrock]

On Tue, 21 Sep 1999, John E Blacet wrote:
> Definitely use analog switches; like some of the Maxim devices which
> handle +15/-15V signals unlike the old 4066.

I feel a little stupid... as soon as this was pointed out I went and saw I
had the polyphony article "the PAL filter" in my set of Thomas Henry
article reprints! I think I skipped over it before because, at the time, I
wasn't interested in All-Pass/phaser type designs. It's probably easily
mod-able for HP/LP use. 

> Seems like I heard the 3320 was not that great a filter, but I could be
> wrong. Must be some reason there are soooo many left....Maybe phasing is
> it's forte?

I've always liked the CEM3320. It's very versatile, even if it doesn't
have as much "character" as an SSM-2040 or moog lowpass. The 3320 filters
I have are very quiet, and switchable modes would be the icing on the
cake. They're also cheap, plentiful, and have a GOOD implementation of
VC-resonance. 

I think Paul asked a while ago.. but I think a MOTM based around the
CEM-3320 would be a good idea. (If this was covered on the MOTM list I
apologise, sometimes I don't pay very good attention ;) Maybe Tom would
like to field a 3320-based filter? The boards would be very small. 

Thanks
Andrew

-| Andrew Schrock | aschrock at cs.brandeis.edu |-