The Donner Harmonic Square delivers professional pitch-shifting and harmonization in a compact pedal. Choose from 7 shift types across Sharp (pitch up), Flat (pitch down), and Detune modes—shift ±2, 3, 4, 5, 7 semitones, jump up an octave or two, or detune ±30 cents for subtle chorus and thickening effects. Dual knobs let you blend wet (shifted signal) and dry (original) for anything from transparent layering to full wet octave textures. Solid digital tracking works across guitar, bass, and beyond. Built tough with true bypass, aluminum enclosure, top-mounted jacks, and compact dimensions. Powered by standard 9V DC.
