The Valve Wizard
Screamer Octave - an octave up pedal made from available parts!
Final Project: Octave Up Pedal – Krishna's Analogue Electronics lab
Octave Up Pedal : 15 Steps (with Pictures) - Instructables
Alex's Octave-Up Rabbit Hole | PedalPCB Community Forum
Guitar FX Layouts: Octave Up Sick Box
ilovefuzz.com • View topic - Passive Octaver
Can you use the JoYo fuzz octave pedal as an octave up pedal by turning down fuzz all the way? - Quora
Boss OC-2 Dual Octave Down Guitar Pedal Schematic Diagram
Guitar FX Layouts: Prescription Electronics Clean Octave Blend
Prescription Electronics Clean Octave Blend - SabroTone
Schematics | General Guitar Gadgets
Schematics
Pedal effect circuit design: getting started - EDN
Searching for a good octave-down schematic for a Theremin. : r/synthdiy
The Valve Wizard
CMOS Workshop Part 4: octave up - PARASIT STUDIO
simple transformer octave gets overheated - freestompboxes.org
DIY Octave Down Pedal (Part 1) - YouTube
Octave Theory/Design Day | The Linux Pizza
octave up sick box fuzz | Diy guitar pedal, Guitar pedals, Electronics basics
Simple Octave Up schematic
One Octave Foot Pedal Controller Schematic
Octave Fuzz Pedal – Guitar Effects Unit | Electronic Schematic Diagram
