Keeley 30ms Automatic Double Tracker - Delay / Reverb effect pedal The Keeley 30ms Automatic Double Tracker - this stereo effects pedal offers a range of studio style double tracking effects that make instruments sound fatter and fuller. A reverb has also been built in, simulating the famous Chamber Reverb from Abbey Roads Studio #2. The Keeley 30ms works perfectly with guitar, bass, keyboards and even vocals and offers a variety of double tracking effects. With the included TRS stereo adapter cable, the 30ms can also be used as a stereo effect or In addition to the effect signal, the dry signal can also be output. In the Double Tracking Pro mode, accessible via two internal DIP switches, further options can be activated in the individual modes. In Dimension mode the 30ms sounds like a chorus without the regularity of an LFO and offers two additional double-tracked voices to the original signal. You can control the tuning and delay of the double tracks using the sliders. Abbey .