Taking the well-loved structure and function of the Korg Pitchblack, the Korg Pitchblack Poly adds a polyphonic feature allowing you to see which strings are out of tune when playing a chord. For guitarists with sensitive floating trems, this tuner is a must-have. Easy to use and calibrated for both guitars and basses, the Korg Pitchblack Poly can be used with multiple different tunings as well.