HARD TERM OPT TERM control sleety our exp ~ sev aur exe ~ sv our Ld n SHAPE TONE SHAPE TONE SHAPE TONE SPEED DEPTH SPEED DEPTH SPEED DEPTH ® ® ® SHAPE Sweeps between modulation shortwaves Center position has a smooth rise and fall Thi great for creating optical tremolo sounds. Hard right has a hard Impact followed by a smooth decline. This creates abrupt and percussive behavior that Is very musical when paired with the Tone knob.