The Pigtronix Dual Expression Pedal lets you control expression functions on two separate effects simultaneously - a claim no other pedal can make. What's more, the Dual Expression sports a polarity reverse switch so you can shift the parameters of two different effects in opposite directions. For instance, ramping phaser speed while decreasing echo delay time produces an audio equivalent of Hitchcock's famous Vertigo visual effect. Whether you're a guitarist or keyboardist, tweaking multiple parameters on the fly lets you craft outrageous, studio-quality soundscapes onstage. Think like a producer while you're playing, with the Pigtronix Dual Expression Pedal.