[sdiy] Resonance control taper ?

Mike Beauchamp list at mikebeauchamp.com
Fri Sep 16 20:37:30 CEST 2022

On 9/10/22 22:55, Danjel van Tijn / intellijel wrote:
> It would be interesting to see a list of famous filters/synths and what 
> control curve they implemented. For example, the SH-101 and Oberheim SEM 
> both use linear tapers.
> cheers,
> Danjel

There's a possibility that the tapers chosen for those famous 
synthesizers had more to do with cost reduction and BOM consolidation 
than what actually feels best for the user.

I have settled on the reverse-audio taper for resonance after trying all 
of the different tapers and picking the one that felt the most natural, 
where a 20% rotation yields a 20% change in perceived sound.

Of course, that's the only reverse-audio taper pot in my entire bill of 
materials.. and it would be so much easier if every potentiometer was 
just a 10K Linear.

I try to spend a lot of time selecting pot tapers though, testing the 
perceived changes and having other people rotate the knobs while 
listening for the changes. I hate knobs that seemingly do nothing for 
half of their travel.

It might be worth noting that pot manufacturers like Alpha offer many 
taper curves that sit between exponential and linear, S curves, etc.


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