Calculating an exponential curve I'm developing a synthesiser and have finished the LFO's.   I'm wanting to provide a knob on the UI for setting the rate.   The minimum value of the LFO will be .01 Hz and the maximum value will be 3000 hz.   I'll have 100 increments in the knob and I want to apply an exponential curve to the values (Lfo rate).  

What is the formula/function for calculating this?
Set $\Delta=\frac{1}{99}\log_{10}\left(\frac{3000}{0.01}\right)$

Then the $n_{th}$ knob position should be 

$p_n=10^{n\Delta-2}$

Where $n$ runs between 0 and 99 in integer step.