Korg Pitchblack Advance Tuner PB-ADAn evolution of the best selling Pitchblack tuner. The ultimate pedal tuner, meeting the needs of every guitarist. As the clear standard in pedal tuners for the guitarist or bassist, the Pitchblack is loved by professionals and amateurs around the world. The Pitchblack Advance is the next generation model, a further evolution that features an advanced cutting edge form and many of the functions and technologies developed for previous models of the