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Maybe a log pot could avoid the need for the equation. But a log or "audio taper" pot is a poor solution for a couple reasons.

1: The ADC resolution is poorly utilized, with just a tiny part of...

Here's a quick way to see what it (or pretty much any equation) really does.



Serial.begin(9600);
while (!Serial) ; // wait for serial monitor to open
for (int knob=0; knob <= 1000;...

Use analogRead() to get the pot position and then call the functions to adjust the filter accordingly.

For an example, check out Part 2-7 in the audio library tutorial, which starts on page 19 in...