[sdiy] How to continually blend from a parallel connection of the two multi-mode resonating filters?

[Dave Leith]

Thanks James

I haven't checked that out, but had considered that approach (the dual
pot) but I wondered if the loop back of VCF 1 to out -> in would
change the resonance characteristics of VCF1?

I will try breadboarding it up...also wondered why I haven't seen this
approach anywhere else as it's very useful.

Dave

On Tue, Jun 9, 2009 at 8:45 AM, James R. Coplin<james at ticalun.net> wrote:
> You can do this with two linked cross faders.  My brain has a sneaking suspicion you could do it with one but I can't quite figure it out.
>
> Signal input connects to filter1 input and one side of xfader1
> output of filter1 to xfader1 other side and xfader2
> xfader1 output to filter2 input
> filter2 output to other side of xfader2
>
> use a double deck pot to control both and you have your continuous x'fadable series and parallel outs.  I think there is an easier way to do this.
>
> James R. Coplin
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Dave Leith
> Sent: Tuesday, June 09, 2009 9:55 AM
> To: SDIY
> Subject: [sdiy] How to continually blend from a parallel connection of the two multi-mode resonating filters?
>
> I own a Sherman Filterbank (http://www.sherman.be/) which has a nice
> feature where one can continually blend from a series to parallel
> connection of the two multi-mode resonating filters. Haven't seen this
> elsewhere and it's a nice feature and never seen circuitry for this.
> Other features which are quite standard is blending from HP->BP->LP -
> it's not this feature I'm interested in...
>
> Any ideas how this could be done?
>
> Thanks
> Dave
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