Reverse octave delay with High/Low octave selection—near-infinite feedback for ambient pads without self-oscillation.

Octave-up fuzz with omnipresent octave and blend control. Most effective above 9th fret with neck pickup.

4 polyphonic stereo octaves (2 up, 2 down) with 22 algorithms, modulation, tap tempo, and MIDI/expression via CTRL.

All-analog boost with a vintage-style octave-up shimmer, on a single Boost knob.

Input-sensitive subharmonic fuzz generating one or two octaves down based on playing dynamics.

Foxx Tone Machine-inspired octave fuzz with vintage character and upper-octave ring modulation.

Warren Ellis signature octave fuzz. Based on 1970s Octavia with ring modulation. Made in Denmark.

Roger Mayer Octavia clone with NOS germanium diodes. Extended boost range for clean octave-up tones.

Analog Weirding Module with envelope filter, fuzz, phaser, and sub-octave. Slider controls.

Octave-up fuzz with Octavia-style circuit. Analog upper octave generation.

Foxx Tone Machine recreation with footswitchable octave and improved tone control usability.

Polyphonic octave and pitch-shifting with intelligent tracking for chords and single notes.

Bass-optimized octave with vintage analog tracking character.

Compact polyphonic octaver with TonePrint. Sub and octave-up voices in mini format.

Aggressive octave fuzz with ring modulator tendencies. Wild, untamed tones.

Octave fuzz descended from the Ampeg Scrambler and Dan Armstrong Green Ringer - synthy upper-octave madness.

Analog octave-up fuzz combining vintage Foxx Tone Machine-style octave with modern controls.

Octave-down fuzz with sub-octave generator. Massive low-end rumble on demand.

Analog octave-up effect. Ring-mod-like upper octave that tracks your dynamics.

Analog octave fuzz capturing vintage Octavia tones with modern reliability, handmade in Germany.

DIY PCB for building a Univox Superfuzz clone - the 1968 octave-up fuzz used by Pete Townshend.

Bosstone-evolved fuzz with voltage-based tone shaping. Analog sub-octave effect at ~1 o'clock Warning knob position.

Dual sub-octave generator with -1 and -2 octaves. LED changes color by mode.

Current Octron with polyphonic tracking and ultimate octave capability.