The HammerOn is part of the Whammy family of DigiTech’s radical pitch-shifting effects for electric guitar, but like, say, the Drop or the Ricochet, it is not controlled via a treadle.

At first glance, the HammerOn appears to be a quasi-hybrid of the Drop – which allows players to drop their tuning from one semitone to a full octave – and the Ricochet, DigiTech's stompbox ...

This dual-footswitch pitch shifter has a four-octave range, seven modes including "Impossible," and can be used to create automatic trills, note sequences and much more ...