[sdiy] input resistors question

[Derek Holzer]

Hmmm.... never mind, I think I worked it out, it had to do with how I 
was wiring the inputs. The problem seemed much more complex last night 
when I went to bed than after some coffee today ;-)

D.

Derek Holzer wrote:
> Pardon me if this is very basic... I have two filters in one module, and 
> two CV inputs. I would like to be able to send either CV input to 
> control the cutoff of either filter by means of four 100K pots (CV1 -> 
> Filter 1, CV1 -> FIlter 2, CV2 -> Filter 1, CV2 -> Filter 2).
> 
> The input resistors for the CV of the filters are 220K each. If the 
> input signal is connected to two pots instead of one, do I need to 
> change the 220K resistor? I.e. do the two 100K pots connected to ground 
> provide less resistance to the CV grounding out, that I would need to 
> compensate for by lowering the input resistor?
> 
> Maybe it's part of a bigger confusion I have about potential dividers, 
> which is why doesn't a CV lose voltage when "fanned" out to several 
> inputs of several modules, each with their own input pots which combined 
> up provide a less resistive path to ground? I know this causes voltage 
> droop with a S&H, I guess it has to do with buffers and such too... I 
> never went to school for this, so it's all trial and error I'm afraid... 
> ;-)
> 
> thx+best!
> Derek

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