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Variable Slope Filter?

Variable Slope Filter?

2007-05-15 by derwskee

I am thinking of adding another panel and was wondering if anyone has
experince with the Variable Slope Filter..I have (2) VCFQ's. I believe
it can get up to 24 db slope but there is no resonance control so
would this sound like a 24db filter at it's lowest resonance? Also,
how "peaky" does it get in band pass mode (what o'clock setting on the
VCFQ resonance would approximate the sounds you'd get?) Thanks very much!!

Re: Variable Slope Filter?

2007-05-15 by matthew carpenter

I don't think it goes up to 24 db/oct but with feedback it can get VERY peaky in any mode. It's one of my favorite filters. Highly recommended. Since we were just talking about using two VCFQ's to make a 4-pole 24 db/oct filter, making sure you have the utility modules to achieve that configuration with two VCFQ's would probably be the best way to get a 4-pole 24 db/oct filter with resonance.
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On 5/15/07, derwskee <synpro@...> wrote:

I am thinking of adding another panel and was wondering if anyone has
experince with the Variable Slope Filter..I have (2) VCFQ's. I believe
it can get up to 24 db slope but there is no resonance control so
would this sound like a 24db filter at it's lowest resonance? Also,
how "peaky" does it get in band pass mode (what o'clock setting on the
VCFQ resonance would approximate the sounds you'd get?) Thanks very much!!


Re: Variable Slope Filter?

2007-05-16 by evetsterueb

I'll second that. When you turn up the slope the edge is quite
audible. The old manual I have shows a response curve which, when the
filter is adjusted for maximum slope, rises to a small peak before
plummeting downwards. I like that it can easily add aural bite to a
sound without diluting the original character of that sound with a
lot of resonance. Plus, when you back off the slope the response
contour smooths out. It does just what your ear wants to hear (my ear
at least). The most objective thing I can say is that it sounds very
different from the other Serge filters; you won't be duplicating what
you have.

Strange feedback trick:
Some sound -> VCSF In1
VCSF Lo -> Bottom 1/3 of Wave Mult -> VCFS In2
Mix towards the feedback input and depending on freq get odd
percussive runs (with a surprising reverby quality) or very raw edgy
noise. Not suitable for yoga music.
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--- In SergeModular@yahoogroups.com, "matthew carpenter"
<matfhew.carpenfer@...> wrote:
>
> I don't think it goes up to 24 db/oct but with feedback it can get VERY
> peaky in any mode. It's one of my favorite filters. Highly
recommended...

Re: Variable Slope Filter?

2007-05-16 by Bill Felton

Another good VCSF trick, if you have a frequency shifter, is to send one of the outputs (lo or hi pass, by preference) into a mixer, and the other into the Frequency Shifter. The output of the FS then goes into the mix with the 'other' output from the VCSF. By varying the slope as well as the cutoff, you get very nice control over the 'shape' of the shifted harmonics being added back in to the "other half" of the signal.
I've found this to be a very powerful sound shaping tool, with hours and hours of squelchy goodness to be had playing around with all the interactions and possibilities ;-)

cheers,
Bill
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On Wednesday, May 16, 2007, at 07:27AM, "evetsterueb" <synth@...> wrote:
>I'll second that. When you turn up the slope the edge is quite
>audible. The old manual I have shows a response curve which, when the
>filter is adjusted for maximum slope, rises to a small peak before
>plummeting downwards. I like that it can easily add aural bite to a
>sound without diluting the original character of that sound with a
>lot of resonance. Plus, when you back off the slope the response
>contour smooths out. It does just what your ear wants to hear (my ear
>at least). The most objective thing I can say is that it sounds very
>different from the other Serge filters; you won't be duplicating what
>you have.
>
>Strange feedback trick:
>Some sound -> VCSF In1
>VCSF Lo -> Bottom 1/3 of Wave Mult -> VCFS In2
>Mix towards the feedback input and depending on freq get odd
>percussive runs (with a surprising reverby quality) or very raw edgy
>noise. Not suitable for yoga music.
>
>--- In SergeModular@yahoogroups.com, "matthew carpenter"
><matfhew.carpenfer@...> wrote:
>>
>> I don't think it goes up to 24 db/oct but with feedback it can get VERY
>> peaky in any mode. It's one of my favorite filters. Highly
>recommended...
>
>

Re: Variable Slope Filter?

2007-05-16 by Carbon111

>it can get up to 24 db slope but there is no resonance control so...

Remember that resonance is only feedback so all you need is a mixer to mix some of the post-filter signal back in for a "resonance control".

Best Regards, James

Re: Variable Slope Filter?

2007-05-27 by matthew carpenter

Finally tried your strange feedback trick. Very nice. I wouldn't have expected the percussive runs you mentioned. They're pretty punchy, too.

On 5/16/07, evetsterueb <synth@...> wrote:

I'll second that. When you turn up the slope the edge is quite
audible. The old manual I have shows a response curve which, when the
filter is adjusted for maximum slope, rises to a small peak before
plummeting downwards. I like that it can easily add aural bite to a
sound without diluting the original character of that sound with a
lot of resonance. Plus, when you back off the slope the response
contour smooths out. It does just what your ear wants to hear (my ear
at least). The most objective thing I can say is that it sounds very
different from the other Serge filters; you won't be duplicating what
you have.

Strange feedback trick:
Some sound -> VCSF In1
VCSF Lo -> Bottom 1/3 of Wave Mult -> VCFS In2
Mix towards the feedback input and depending on freq get odd
percussive runs (with a surprising reverby quality) or very raw edgy
noise. Not suitable for yoga music.

--- In SergeModular@yahoogroups.com, "matthew carpenter"
<matfhew.carpenfer@...> wrote:
>
> I don't think it goes up to 24 db/oct but with feedback it can get VERY
> peaky in any mode. It's one of my favorite filters. Highly
recommended...


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