MOTM

> One interesting note is the '5' position is always around 220Hz (set by
> another resistor). So, the COARSE resistor can be though of how 'fast' the
> lower and upper frequencies are reached. Is it better to have:
> 
> a) 10Hz to 10Khz
> b) 2Hz to 18Khz
> c) 0.5Hz to 30Khz

I vote for the "c" option.

e