The Deja Vu contains all the standard delay controls (wet/dry knob, feedback, delay time) with some notable extras. A dedicated tap tempo footswitch with a ratio knob (half note, quarter note etc.) makes it unbelievably easy to adapt complicated delay settings on the fly. Meanwhile, a toggle between a true bypass mode and trailing repeats lets you kill the delay effect while letting the echoes trail off. This allows for adding anything from sweet flourishes to ringing shock waves.