Is there a simple way to convert the active tone controls of the Brown Betty circuit to cut instead of boost? Link to the doc: https://docs.pedalpcb.com/project/BrownBetty-PedalPCB.pdf I'm specifically interested in doing this to the mid control.
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Is the op amp stage following the mid control necessary? IC3.2 is already in use by the bass control so I guess this would require an additional op amp.
