Electro-Harmonix POG (Polyphonic Octave Generator)
DSP-based polyphonic octaves — pretend to be a Hammond organ on demand.
We don't ship reference schematics until they've been hand-authored against authoritative sources (manufacturer service docs, ElectroSmash analyses, GEOFEX writeups) and reviewed in the simulator. Until then, the BOM, signal chain, controls and mod notes below are accurate, and you can still add this pedal to a project — it just won't include a circuit yet.
About
DSP-based polyphonic pitch shifter that produces stable +1 octave, -1 octave, and dry signals simultaneously. Unlike analog octave-up pedals it tracks chords perfectly; unlike the older PS-3/PS-5 it has minimal latency. Three sliders mix the dry, -1, and +1 outputs.
Signal chain preview
5 stagesQuick facts
- Used on Jack White's 'Seven Nation Army' bass-octave riff (live setup) and countless church-rock organ-impersonation tones.
- Spawned a family: Micro POG (2009, simpler), POG2 (2008, more octaves + filter), Nano POG.
- Marketed as a pitch shifter but functionally a real-time additive-synthesis organ.
Controls
- Dry slider
- -1 octave slider
- +1 octave slider
- Low-pass filter (POG2 only)
Mod recipes Pro
3 mods- Expression input
Sweep the low-pass filter (POG2) or fade-in voices via TRS expression.
How: Tap the LPF control voltage line on the DSP; wire a TRS jack with the tip carrying 0-3.3 V from an expression pedal.
- Wet-only mode
Mute dry for octave-only synth pads.
How: Add an SPDT toggle that grounds the dry-slider's output buffer input.
- Stereo bypass + wet/dry rig
Route dry to one amp, wet octaves to another.
How: Split the post-DSP path: dry slider feeds output A, the two pitched voices feed output B through their own buffer.