Parametric/variable Q EQ

[Sasha Sekulich]

On Sat, 4 Apr 1998 22:15:03 +0930, you wrote:

>Y-ellow Sasha.
>        
>At 01:05 AM 4/4/98 GMT, Sasha Sekulich wrote:
>>Yes, it's me again. :)
>>
>>Another thing I would like to make for my guitar is an eq. I have some
>>already (Baxandall), but I would like to make one with fixed frequency
>>and variable Q, and another which would be the usual parametric
>>(variable lower & upper limit), but done in as-simple-as-possible design
>>(I have Ibanez, Korg and DOD schematics which are overkill for me) so I
>>could put it in the guitar to complement the Baxandall that is there.
>
>I'm just curious as to your reasonning on needing a fixed frequency and
>variable Q? I thought about it and, yes, this would be easilly possible.
>Just preset the frequency of a parametric EQ (State Variable filter) And
>you'd save yourself the cost of a double ganged pot. But I can't figure out
>why you would want to do this.

Well, I am weird at the times... :) I thought of putting it at, say, 330
Hz, with variable Q. That way I could control if I would have gain on
the higher strings or higher and lower. And place in front of the
distortion, that would yield more distortion on the higher frequencies.
And, finally, I already have Baxendall (250 Hz and 5kHz), for which I
need some kind of controlling the *mid* frequency gain (1kHz), and by
having variable Q I could control the gain of lower & higher frequency.
I don't need variable frequency since I already have control of other
frequencies, I just need the 1kHz one, so I thought I could save some
space in the guitar and get rid of that pot (I already have three, and
putting parametric EQ would give me three-four more).

You synth players always want more control, but I need some place in
order to pick my strings (it's not really that I will pick them all, two
are enough :).

One day I'll buy/make a synth too, and then I'll have a big trunk loaded
with pots and switches, and 64 VCOs, 16 VCFs, ADSR modulators etc. :)
And if I get really adventurous, maybe I'll put a few keys in there, so
I could play it! ;)

CU, Sasa
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Sasa Sekulic, student at the Fac. of Physics and Fac. of Philosophy
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