A special mini amp channel switcher/FX loop pedal (When you actually only use 1 of the 2 functions and the other is always on or off) Details in comments. : r/diypedals
DIY; Pedal Order Switcher. HELP NEEDED! : r/diypedals
beavis audio research
beavis audio research
Programmable True Bypass Guitar Effect Looper Station Using Dip Switches : 11 Steps - Instructables