Cgs synth

>ok, but if I...
>
>>put a single gang pot in series with one of the 100k stages (one will be

backwards from what you want), or use two separate 100k pots instead.

>
>this'll give a 'true' bandwidth function ?

It should. I haven't tried it, but essentially a band pass filter is a high
pass and a low pass in series. Moving one of them will change the bandwidth.

>and to clarify...
>>put a single gang pot in series with one of the 100k stages
>
>between pin7, from the 1st opamp, and the 100K, or the other side (does it

matter)?

It does not matter shich side of the pot you connect to, though it will
matter which of the 100k sections you connect to. I think the one mentioned
here is the correct one, but if you find the band getting narrower to the
point where nothing will pass, try putting it in series with the other 100k
instead.

>and this'd be either that / or, one between the 680R and the 100K,

Yes, this is the correct position for the second possible location.

>>or use two separate 100k pots instead.
>
>instead of the dual gang on the cct ?

yes.

>
>>Wire the pots as per the DC mixer diagram.
>
>out of the filter via 50K pot and 47K onto B (below),

there was no "below". art isn't transmitted in this group.

Look at the CGS04 page. Each bandpass output goes to a pot as per the
example pot shown on the CGS04 circuit diagram.


Ken
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