[sdiy] Buchla 291 simulation 2

[Dave Krooshof]

>>  I can confirm this behaviour. A Buchla (and some clones)
>>  and the VCS3 were the first analogue synths I learned to play,
>>  and their filters were allways fat in the bass, voicy in the mids.
>>  So that fits your description.
>
>But now I'm puzzled. The VCS3 filter has less gain when
>its cutoff frequency is set to midrange ?
>
from my sound memory, it has a a rather complex curve,
not a simple humb in the midrange. It always produces
a formant, not just a peak like a wah. That's why I think
it has a dip too.
But... Do you mean that the gain as a whole is less when
your filter is set to the midrange? That's not what I meant, but
it sounds like a feature to me.

>>  And filters with a fixed bandwith in Hz have less resonance
>>  in the lows, as octaves have fewer Hzs there.
>
>Yes, but this explains the _width_ of the bandpass, not the level.
unless the LP and the HP slope are real close, so they can peak together.
(sounds romantic eh, and who said electronics are cold and rational?)
>
>JH.

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groets,

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