Best pot taper for rate pot here?

[soggybag]

I'm trying to figure what would be the best taper for the rate pot here?

[ElectricDruid]

It's setting the voltage that the integrator charges from. Doubling the voltage doubles the slope, and if you can go up and down twice as quick, you've got a triangle wave of double the frequency. I think!

On that basis, log pot would be best. It's only covering a 1:6 range though (2K2 to 2K2+10K) so it might not matter too much - that's not a very wide sweep.

[soggybag]

Thanks that's super helpful!

This is part of a tremolo and the range seems pretty good for that application.

[DrAlx]

On that basis, log pot would be best. It's only covering a 1:6 range though (2K2 to 2K2+10K) so it might not matter too much - that's not a very wide sweep.

Linear is better here I think. For the usual triangle/square wave oscillator, you tend to see rate controlled in one of 2 ways.
One way is to let the charging current for the capacitor flow through a logarithmic pot (using it as a rheostat).
The other way is to have the current flow through a fixed resistance, and instead scale the voltage at the square wave output with a linear pot (acting as a voltage divider) which is the scheme here.
The idea with either approach is to avoid the sweep from the pot being all bunched up at one end.