The stereo waveshapers are the basis of the grep. When used as insert effect on a mono-track, only one of them will work. Some settings of the waveshapers may cause a distortion of the stereo-image, this can be adjusted with the balance-knob in the master section.
CLATTER section adds clatter to the sound. The slider controls mix & clatter-modulation.
SPLATTER section splats the sound, the amount of splattering can be adjusted with the slider.
KLONG section rectifies the signal. There's also a button to splut the klong.
SPUTTER section adds sputter to the sound, the amount of sputtering can be adjusted with the slider.
F & Q sliders in the FILTER section are frequency (F) & resonance (Q) controls.