Hi Ingo

I think this is partially "normal", especially in higher frequencies.

The Spec-Sheet of the CEM3320 also notes: that the resonance frequencies
of the various filtertypes are different for the same values:
http://curtiselectromusic.com/uploads/CEM_3320_Long.pdf
Page 4, 2nd column.


You also may observe that the highpass becomes a littlebit bandpasss
like in the higher frequencies. There is an modification to prevent
this, this modification also removes this drop in cutoff - but the
negative side of this modfication is, that the selfosciallation becomes
a little uncontrollable in higher regions.

Florian

selfoscillate schrieb:

>
> --- In Doepfer_a100@yahoogroups.com , Monroe Eskew <monroe.eskew@...> wrote:
>> Hi,
>>
>> I am finding that the A121 resonance level influences the cutoff frequency.
>> When the resonance level is swept up at self-oscillation levels, you can
>> hear it drop a few tones. It's been a while since I've played it like this,
>> but I seem to remember it not doing that before (but maybe I was dreaming).
>> So is this behavior normal and expected, or is something wrong
>>
>> Thanks,
>> Monroe
>
>
> i'm not 100% sure about this, but i think it could be normal.
> i have to check it on mine, but mine is modded (hotter input)
> and maybe responds a bit differently anyway.
>
> dieter, maybe you can tell us more
>
> best wishes
>
> ingo
>