The Ernie Ball Expression Series Ambient Delay is a unique, sweepable delay pedal with additional plate reverb emulation. With the timing and feedback controls on the delay side all the way down, the Ambient Delay acts as standalone reverb that can swell up and ramp down as needed. Twist up your delay controls for anything from slap-back for quick picking to longer repeats for more spacious sections, altering the wet/dry mix by sweeping through the expression control with your foot as you play. For more on the fly control, you can connect your favorite tap switch to tap the tempo in during your set.