[sdiy] Oberheim Xpander Multimode VCF Question

[Jay Schwichtenberg]

I think a lot but don't actually get a lot done. But here is what I thought
would make an interesting filter experiment.

Buy one of Tim's (Magic Smoke) Mankato filters and some extra SSM2164s. You
have the filter taps coming off the board so take those and run them into a
quad 2164 VCA and fold that back into the filter like the OBie filter does.
Add some static pots and VC input to control the VCAs. Could be interesting.

Jay S.

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Magnus
> Danielson
> Sent: Friday, March 12, 2010 1:23 AM
> To: karl dalen
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Oberheim Xpander Multimode VCF Question
>
>
> karl dalen wrote:
> > Or simply take five trim pots one for each tap and
> > trim until your ears declares a nice swoosh sound.
> > Sometimes what looks neat on paper dont sound to
> > interesting.
>
> Certainly... but he asked for a 4-pole all-pass.
>
> What makes a good sound is an entirely different matter.
>
> Also, I assume that the output of that all-pass would be mixed with the
> input for the null-cancelling effect of a phaser.
>
> The nice thing about the Xpander filter is that it allows easy access to
> a number of unusual combinations that very easily can be accessed and
> chosen among to find what fits a particular sound best.
>
> The rigid-ness of low-pass/high-pass and possibly band-pass is not
> necesserilly what is musically most usefull or meaningfull.
>
> Cheers,
> Magnus
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