The Korg Nu:Tekt HD-S Harmonic Distortion is a DIY guitar effects pedal designed by Fumio Mieda. This unique pedal features three distortion circuits, offering a wide range of harmonic distortion sounds from classic fuzz to innovative, never-before-heard tones. Its versatile design makes it suitable for guitars, bass, and synthesizers, allowing for sonic experimentation. Inspired by the original Maestro Fuzz-Tone, the HD-S allows users to create their own effects without soldering.