VCF and VCO problems

[Grant Richter]

Romeo Fahl has corrected me.
I had not seen the Korg MS-20 design before.
I have no idea how it works, the design I
was talking about was a "standard" 12 db/oct
lowpass/highpass switched filter.

So forget everything I said.

----------
> From: Niklas Rönnberg <nikro at itn.liu.se>
> To: Synth Diy <synth-diy at mailhost.bpa.nl>
> Subject: VCF and VCO problems
> Date: Monday, January 31, 2000 2:43 AM
> 
> Hello!
> I have some problems with a vcf...
> http://www.itn.liu.se/~nikro/littleman/vcf.gif
> The Hi/Lo switch works fine, but the cutoff does not effect the sound
> that much. Yes, I can hear a difference but not enough. It's the same
> with the res-pot, it don't do its work! Maybe I should use different
> values of the cutoff and init-freq. pots, maybe it would be better to
> use another sort of diodes? Any comments? Please

> The whole project is here:
> http://www.itn.liu.se/~nikro/littleman/littleman.html
> I has also some problems with the VCO. I think the FET is the problem

> Is this correct?
>        |---  S
> G  --->|
>        |---  D
> Does anyone know the correct "pin-layout" for the BF256C? I think I have
> reversed mine

> The dist works fine, soft and crispy. :-)
> Thanks for your help!
> Regards 
> /Niklas
> ______________________________________________
> |                                            |
> | Niklas Rönnberg, Lecturer                  |
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> | Dept of Science and Technology (ITN)       |
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