[solved/derailed] Weird filter response : inverted cutoff and resonance?

Discontinued products Shruthi
#1

Hello Shrutizens,

I’m currently working on adding a Polivoks filter in parallel to my awesome but so far SMR-only Wasp XT™ Shruthi.

Apart from minor issues with phisical switches I’m facing something really unexpected :
I tested the two filters separately and they are ok but when tweaking the parameters I realized that “cut” seems to control resonance and conversely, “res” seem to affect cutoff, on both of them
Could it be that I messed up the wiring between the filters and the digital board (since i’m not using the standard connector to stack the boards anymore) ?
If so, which ones should I look at ?

Thx in advance

#2

Any ideas anyone ?

#3

Looks like a wiring problem indeed!

#4

Big chance that you reversed 2 wires in the connector. That would explain what you notice

#5

Alright then !

What pins are used for cutoff and resonance on the boards ?

#6

They are labeled F for Cutoff and Q for Resonance

#7

Obviously they were inverted : that what’s happening where you’re using pale red and pinkish red wires together while being slightly color blind…

You are a lucky man if can see “74” here :

600px-Ishihara_9.png600×600

#8

Or welcome to the darkside if you see “21” like me

#9

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#10

#11

(actually for some Animal Collective Acid Eye Psych, better check the image in high quality there, it’s quite stunning when zoomed)

#12

There is mushrooms in that picture!

#13

My brain hurts looking at those