digitech drop
The Digitech Drop is a dedicated polyphonic drop tune pedal that allows you to drop your tuning from one semitone all the way down to a full octave with a press of a button, rather than sweeping an expression pedal like the Whammy. The Digitech Drop does also feature a momentary/latching switch which when set to momentary can have a similar effect to the whammy, Digitech say it enables “Fast trills and roller-coaster pitch dips.”

The effect will be enabled or disabled only as long as the footswitch is pressed and held in momentary mode, whereas setting this switch to “OFF” will cause the footswitch to act as a standard latching on/off switch.