format filter bank/string filter

[Christian Hofmann]

On Fri, 2 Oct 1998 08:19:16 +0200 (MET DST)
Martin Czech <martin.czech at intermetall.de> wrote:

> > I am looking into building a format or string filter for
> > various vowel formats. I have the freq. of the required bands I would
> > like to pass.
> > 
> > here is the question(s):
> > are there any circuits posted for  this ( I think moog had such a filter
> > bank)?
> > any suggestions for simple active ( or passive) bandpass filters
> > designs?
> > 
> You mean "formant", right ? What is a string filter?

Aah, that mysterious string filter. Supposedly there has been a thing
like the "Moog String Filter". 
The liner notes of Jon Lord's "Before I forget" album mention it on a
couple of tracks, together with the Polymoog. Since the Polymoog alone
wouldn't come close to that marvelous sound at all, I suspect that string
filter to have been a Solina like chorus circuit. Can anybody shed some
light on this?

cu
Christian