Wob-Wob Fader is simple CV-source controlled by fader. The feature here is that maximal voltage is reached in the middle position. This controller make it possible to easy perform sweeps widely used in modern music. similar technique is used with vinyl disks. This module has one Wob-fader and one fader with selectable mode.
UPDATE: Values of R2 and R3 can be changed to 4.7K to obtain more expressive sweep.
This circuit is published under Creative Commons «Attribution-NonCommercial-NoDerivs» 3.0 license.
Any use beyond this license must be discussed with author.