linear to log/exp function for Hz

[23fx23]

this should be pretty simple maths and i feel ashamed to not be able to solve this.:rolleyes:


anyone knows what is the math or script code to convert a 'linear' input value to a exponential or log one, and what is the best to use for Hz .frequencies?
you know like equalizers have a typical log representation. tried log and exp but not sure the way to do..

I dlike kind of the same thing as the mapper curve module effect, with a 0-1 range 'linear' array on input that would output a frequency response according to min/max freq.,
or output a 0-1 range that i multiply by max freq.

or exactly the curve when you got a 0-1 fader swiched to log scale .

plz help!

[Clearscreen]

I'm interested in this at the moment as well - anybody got any suggestions?

[senso]

use the module power.
try various B coeff for example 5 or 1/5 depending of the scale conversion

with B = 5 we have

Freq(Hz) = 20000*power(ValueLinear,5)
ValueLinear = power(Freq(Hz)/20000,1/5)

choose the B coeff as you want ie 3,4,5,6


senso++

[Fléau]

For equalization purpose,
if we consider that 640Hz is the half value,
5 is the right coeff.

[23fx23]

thanks a lot for the help olivier!!!!