[sdiy] OTA to voltage-control resonance?

[Scott Gravenhorst]

cheater cheater wrote:
> Hi guys,
> I've been looking at some monosynths and one thing has me wondering:
> if I have a potentiometer somewhere in the filter's resonance
> feedback, can I safely replace it with an OTA based 'voltage
> controlled resistor' without changing the sound?
> 
> I understand the best answer could be 'depends' - so, what does it depend on?
> 
> Do OTAs work like buffers, similarly to op-amps?

"without changing the sound?"...  That's a loaded question.

However, "change" can be either good or bad.  Some nonlinearity in the feedback circuit can
actually be a good thing.  Some distortion can be a good thing (Wasp).  But the only way any
one of us ever knows for sure is by building it up, being frustrated by it, modifying it,
etc. and testing it with speakers until we're satisfied that it's useful or that it's crap.

It's worth an experiment, don't you think?

Why not try it and then report back with results - i.e., the things that suck and how you
fixed it to suck the least?  And the things that were awesome...  

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
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