Digitech XBW Bass Synth Wah Pedal Sens - adjusts the trigger threshold of the synth, filter and envelope effects. Control - adjusts wet/dry mix, or synth or filter attack. Range - adjusts envelope range, cut-off frequency, or frequency envelope. Type - selects between seven different Bass Synth Wah effect options, including Envelope, Envelope Sub, Synth 1, Synth 2, Filter 1, Filter 2, and Octa Sub. Normal/Dry and Effect outputs Sens - adjusts the trigger threshold of the synth, filter and envelope effects. Control - adjusts wet/dry mix, or synth or filter attack. Range - adjusts envelope range, cut-off frequency, or frequency envelope. Type - selects between seven different Bass Synth Wah(TM) effect options, including Envelope, Envelope Sub, Synth 1, Synth 2 Normal/Dry and Effect outputs Type - selects between seven different Bass Synth Wah(TM) effect options, including Envelope, Envelope Sub, Synth 1, Synth 2 Type - selects between seven different Bass Synth Wah effect options, including Envelope, Envelope Sub, Synth 1, Synth 2, Filter 1