Electronic Audio Experiments Mirror House V2 Signature

The Mirror House V2 Signature is a pitch-shifter and oscillator pedal from Electronic Audio Experiments, made in collaboration with the Boston indie band Pile. It creates two pitch-shifted copies of your incoming signal that veer off in equal and opposite directions: one voice moves up while the other moves down¹. Where most pitch-shifters aim for clean, precise tracking, this one leans the other way. Guitar Pedal X described its character plainly:

That looseness is the point. Delicious Audio found the results range "from subtle detuning and chorus to bizarre microtonal clusters, dissonant harmonies, and dynamic glissandos"³. Envelope-controlled pitch-shifting creates dynamic vibrato, glissando and divebomb effects as the voices are pulled apart¹, so the effect responds to how hard you play.

What it does to your sound

The core circuit makes two pitch-shifted versions of the input signal moving in opposite directions³. Turn the Amount knob clockwise and the two voices move symmetrically away from the original signal, the upper voice up and the lower voice down¹. Because the shifting is deliberately loose, the pedal sits somewhere between a conventional pitch shifter and a modulation box: at gentle settings it reads as detune or chorus, and pushed further it produces dissonant harmonies and microtonal clusters³.

Guitar Pedal X's Stefan Karlsson called it "a really interesting new pitch-modulation circuit, a tiny bit reminiscent of EQD's Rainbow Machine, but very much its own thing," and preferred the slimmer form factor². In the site's 2025 round-up of the year's new modulation and pitch pedals, he added a note on how to use it:

The controls and shift intervals

The pedal's modes include Shift, Detune, and Flutter, with Flutter selected by the middle toggle position²¹³.

In Shift Mode, the Amount knob dials in 13 different intervals, from Unison through minor 2nd, Major 2nd, minor 3rd and onward up to +1 Octave². Detune Mode applies the effect as detuning, and the new Flutter Mode, added in V2, functions similarly to Detune but with the Animate knob controlling a random LFO, which the maker describes as good for chorus and vibrato sounds¹. Delicious Audio notes that in Shift and Detune modes Animate responds to your playing dynamics, so the pitch movement follows your attack³.

The manual includes suggested settings for Detune, Disorient, Vibrato, Stacked Harmonies and Divebomb, among others², which gives a picture of the pedal's range from usable modulation to full-on pitch chaos.

Power and connections

Power comes from a 9V DC supply with a 2.1mm center negative barrel jack¹. The current draw is 95mA¹, which is modest by digital standards but well above what a battery or a minimal daisy chain is comfortable supplying, so a proper pedalboard power supply is the practical choice. Input impedance is 500kΩ at 1kHz and output impedance is under 1kΩ at 1kHz¹, so it plays safely with most guitars and downstream pedals.

The V2 Signature made with Pile

The Mirror House was originally developed in collaboration with Electronic Audio Experiments' friends in the band Pile¹, and the V2 Signature edition, released in May 2025, continued that partnership². John Snyder is the designer behind the circuit, and Guitar Pedal X placed it in a run of his innovative modulation designs².

Version 2 brought specific improvements over the original: updated relay bypass switching, improved envelope tracking for the Shift and Detune modes¹, improved envelope sensitivity and lower noise³, and the new Flutter Mode³. The pedal measures 121mm x 66mm x 40mm and weighs 0.4kg¹, and the list price is $249.00 USD¹.

Videos

Click to load

Click to load

Click to load

Questions