Doheny Audio Duppy Octave Module – Octave Up Guitar Pedal

The Doheny Audio Duppy Octave returns, refined through player feedback and real-world use.

An octave circuit at its best lives above the 12th fret, where notes compress and bloom—especially through the neck pickup, where the Duppy takes on its most vocal, unstable character.

One Volume control keeps it direct. A three-way switch shifts harmonic texture—from tight and focused, to biting upper octave edge, to a looser, more chaotic voice that reacts strongly to your touch.

Voiced by ear. Built in limited runs. Never mass-produced.

Each unit is hand-assembled and calibrated in Salzburg, where final tuning is done by playing, not measurement.

Built in small runs. Lead time 1–2 weeks, depending on workflow.