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PostPosted: Tue Oct 26, 2021 2:53 pm 
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I have familiarity with standard opamp state variable filters, but none with OTAs, and on opamp SVFs its very easy to change the filter gain by changing one resistor. On the OTA based BYOC Env Filter is there a similarly easy resistor change that accomplishes this?

This is to balance out the volume between bypass and filter engaged for live playing, most times there is noticeable perceived volume increase on env filters, at least the way I set them.

I would not use the fixed/env switch so I could put a pot wired as a variable resistor there for volume control.


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PostPosted: Tue Oct 26, 2021 4:20 pm 
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Location: Richland, WA
If you want to reduce the volume of the effect when engaged, you can slap a passive volume control on just about anything. Replace the 100k/R18 resistor with an A100k pot. Connect lug 3 to the "7" eyelet on the PCB. Connect lug 1 to ground. Connect the center lug 2 wiper to terminal 7 of the footswitch.

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PostPosted: Fri Oct 29, 2021 12:53 pm 
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Yes I see what you are are saying that will definitely work. It would be a higher output impedance but where I am putting this in the chain no biggie.


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PostPosted: Fri Oct 29, 2021 1:07 pm 
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R18 is 100k as it is. You can use pretty much any value you'd like if you want a lower output impedance. You could use a 10k pot if you'd like. That's not uncommon to see in some effects. I don't see why you couldn't use a 5k or a 1k pot if you wanted to go even lower.

Or you can add another decoupling capacitor and and an output impedance resistor.

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