The Ground Control Audio Tsukuyomi is a midrange booster guitar pedal that delivers up to 26 dB of flat gain and an optional 12 dB mid‑boost centered around 880 Hz – 1 kHz to help guitar leads stand out in a mix. It features a high‑impedance JFET frontend and cascaded gain stages for tone preservation with low noise. A simple single control knob adjusts overall gain, and a toggle switch engages the midrange boost. The pedal is designed to add warmth, fullness, and presence to single‑coil and treble‑heavy rigs while providing “velvety fullness” and sweet character on humbuckers.