This Pedal is currently available.
Octave Modulator / Synthesizer
The first ever guitar synth with octave modulation
So what the heck is octave modulation? The octave theory seamlessly crossfades between octaves. Paired with an awesome filter this creates a multitude of possibilities. like 8 bit chiptune sounds, classic guitar synth, super sub bass tones and the world’s first ever shepard tone guitar synthesizer.
With great power…
An array of knobs covered many early 1980s synthesizers. This gave you the power to create a wide range of sounds. Of course, on some settings the synthesizer wouldn’t make a sound, would go into uncontrollable oscillation, or make weird noises. Sometimes the weird noises weren’t the weird noises you expected.
While many guitarists enjoy tweaking and honing their tone most of us don’t have that level of patience for fiddling with a matrix of interactive settings. The Octave Theory strikes the perfect balance giving you the power to create your own sound without endless knob tweaking or (gasp!) a tedious menu driven interface.
https://subdecay.com/effect/octave-theory-octave-modulator-synthesizer