Digitech drop pedal is solution for all tuning related problem, The sound quality of the Digitech Drop is crucial. A lot of pitch shifters result in a very artificial sounding tone which takes the fun and usefulness of the effect. Fortunately Digitech have had plenty of experience with pitch shifters thanks to the Digitech Drop. As a result, the Drop sounds great. Shifting down a few semitones sounds completely natural and its only when you start to approach an octave lower when you start to notice your tone change. It doesnt quite sound digitized, but the tone does change. But when I compare it to other pitch shifters or even high quality pitch shifters I have in my DAW, the Drop does an incredible job.