Several mods are available for this pedal including 2 expression pedal ports! We couldn't do Tap Tempo yet, so we designed GLIDE TEMPO. Control the Delay Time with a custom modded expression pedal! Control the Delay Level with a custom modded expression pedal! Now you can have just the right slap back echo or spacey long delays, or GLIDE back and forth for a crazy warped sounds! Set the level of your delay for the sweet spot. No more adjusting the Level by bending over when you switch between clean and distorted tones. Delay levels are often too loud when you add distortion to your signal
AD-9 Mod page at Keeley 's website...