Digitech XSW Synth Wah The Compression/Sustainer and Envelope Filter Pedals rounding out DigiTech's® Top Ten list of cool pedals are the Main Squeeze™ compression/sustainer pedal and the Synth Wah™ envelope filter. These effects are at the top of every guitarist's list of hot stompboxes for their stage arsenal. The Synth Wah™ envelope filter doesn't cop out by giving you only one sound to work with and try to tweak. The DigiTech team has gone way beyond that with a full 7 different types of sounds to choose from, including vowel sounds, wah types, and other goodies. This pedal gives you a ton of effect bang for the buck. Controls feature Mix, Range, Sensitivity, and Vowel. Outputs feature Output and Tuner Out. Features: 7 different Wah types and vowel sounds Triggering and step capability Normal & CIT™ Cabinet Modeling outputs