Gain is fixed, so playing dynamics and the guitar volume set how hard the fuzz bites. The octave control blends an analogue octave-up from silent to full mix, while Balance sweeps between the darker Shadow voicing and the brighter Sun voicing. That Shadow-to-Sun shift is clearest when the octave is turned up.

True bypass keeps the path simple on a Nano chassis with one Input and Amp jack. Rhythm fuzz can sit with little or no octave; lead lines can push the octave high for a sharper upper voice.

The pedal is mono and fully analogue, with the Status LED marking when the effect is engaged.