SergeModular

--- In SergeModular@y..., "Sebastian Kuehnl" <skuehnl@y...> wrote:

> Hi Romeo,
>
> ----- Original Message -----
> From: "Fahl, Romeo" <8brain@s...>
> To: <SergeModular@y...>
> Sent: Friday, June 01, 2001 11:42 PM
> Subject: [SergeModular] Variable Bandwidth VCF
>
>
> : Hello SMOGers,
> :
> : Got a question about the Serge variable BW filter. I noticed

that there

> is
> : no resonance control on this filter (same as on its predecessor,

the

> Buchla
> : 291 VCF). Is there no need for that since you can sweep the

bandwidth?

> I'm
> : assuming that sweeping resonance has a similar effect as sweeping
> resonance,
> : but can someone clarify that for me?
> : Seeing filters without resonance controls makes me nervous.
> :
> : Romeo
> :

yahoo.com

Hi Romeo
.
there is some similarity between resonance & bandwith in that
they both narrow/expand the freq. spread that the filter is working
on , but resonance tends to make a less uniform slope to the shape of
the filter. More resonance tends to make the actively processed area
narrower in bandwidth . The vc slope & vc bandwidth filters seem to
have sensibly chosen resonant settings , plus you can create your own
resonance by feeding the output back in to some degree(feeding the
signal thru in a feedback loop. you can also use two filters in
series , or in parallel , to increase db per octave cutoff , double
resonant peaks etc. Hope my layman speek makes sense .
Also on the 24 db per oct. debate - Are'nt there several 1 v
per o. filters available from a multitude of sources ?
oscillate wildly
P.K.