Simple Octave Up Breadboard. (The playing is not important) - YouTube
Schematics
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CMOS Workshop Part 4: octave up - PARASIT STUDIO
The Valve Wizard
Alex's Octave-Up Rabbit Hole | PedalPCB Community Forum
Ring In Return Octave-Up Fuzz DIY Pedal Kit – Guitar Pedal Parts
simple transformer octave gets overheated - freestompboxes.org
Simple Octave Up schematic
Octave Master
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Pearl Octave - www.davidmorrin.com
octave up sick box fuzz | Diy guitar pedal, Guitar pedals, Electronics basics
Can you use the JoYo fuzz octave pedal as an octave up pedal by turning down fuzz all the way? - Quora
Fuzz Central -- fOXX Tone Machine
Alex's Octave-Up Rabbit Hole | PedalPCB Community Forum
Octavio and Octave up Theory
DIY Octave Down Pedal (Part 1) - YouTube
Screamer Octave - an octave up pedal made from available parts!
simple octave up pedal for bass : r/diypedals
Alex's Octave-Up Rabbit Hole | PedalPCB Community Forum
Guitar FX Layouts: Prescription Electronics Clean Octave Blend
Green Ringer - Octave UP!
