- controls the depth/amplitude of the modulation (the size of the range in which the effect sweeps).
- controls the speed/rate of the LFO wave that controls the effect
- sets the amount of effected signal fed back into the effect (for a stronger effect)
- controls the frequency of small boosted range of frequencies, turning the knob clockwise moves that frequency from low to high (bass to treble).
No forum threads about this effect yet.
Here's some code to post a link with image on forums, eBay, websites,...