The Seymour Duncan Vapor Trail analog delay pedal uses classic bucket brigade circuitry with some additional useful features. With traditional controls for Mix, Repeats and Delay, the Vapor Trail also features Rate and Depth knobs to add modulation and a blinking LED in the Delay knob that blinks in time with the rate of the delay. It also offers a TRS wet insert to send the wet signal to other effects, separate the wet and dry signals to two different outputs, or to plug in an expression pedal for hands-free control over the amount of wet signal. The Vapor Trail has been used by such artists as Peter Frampton, Jeff Tweedy of Wilco, Alex Skolnick, Monte Pittman, Oz Noy, Don Alder, Robin Finck of Nine Inch Nails, and Troy VanLeeuwen of Queens of the Stone Age.