Search for: Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › Topic Tag: Digitech rp400 circuit noise Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Help tracking down noise in circuit Started by: Anonymous in: GuitarPCB Build Support 2 3 3 years, 7 months ago Anonymous Viewing topic 1 (of 1 total)