- 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.