he Drop polyphonic drop tune pitch shifter guitar effects pedal from DigiTech is a revolutionary pedal that provides guitarists an innovative way to drop their tuning without actually adjusting their guitar's tuning pegs. The Drop uses an advanced polyphonic drop tune algorithm to allow players to drop their pitch from one semitone all the way down to a full octave. You can now achieve a lower, chunkier tone instantly at the stomp of a footswitch instead of having to tune down between songs.