I highly recommend you dedicate an Oakley Multimix with the Hendry triple
attenuator modifications to the Steiner VCF without attenuators. This gives
you three reversing attenuators for three different inputs to the Steiner
VCF, or use just one input through the Multimix to all three Steiner VCF
inputs to get the all pass mode.
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.comThe Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com > -----Original Message-----
> From: Richard Brewster [mailto:pugix@...]
> Sent: Thursday, March 11, 2004 6:37 PM
> To: ModularSynthPanels@yahoogroups.com
> Subject: Re: [ModularSynthPanels] CGS Synthacon VCF Stooge panel
>
>
> ixqy@... wrote:
>
> > Do you mean each of the three existing inputs on the PCB (LP/BP/HP)
> would
> >need an opamp mixer in order to sum the All Pass to each of the three
> said
> >inputs?
> >
> Yes.
>
> > Is this because a passive mixer would load the inputs? Sorry for the
> >technician part of me showing. ;-)
> >
> >
> Basically, yes. The Synthacon VCF inputs presume a single low-impedance
> signal coming in. Injecting two signals at any of these inputs really
> calls for a proper mixing circuit.
>
> What's the opinion about the All pass feature? I know Cynthia Webster's
> version of the Synthacon has it, but there is not a separate attenuator
> for the All input.
>
> -Richard Brewster
>
>