Search for: Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › Topic Tag: octave up Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Emerald Ring Doc? Started by: Anonymous in: GuitarPCB Build Support 3 4 5 years, 5 months ago Anonymous Viewing topic 1 (of 1 total)