What Is A Guitar Pedal Switcher & How Do Switchers Work? – My New Microphone
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
Programmable True Bypass Guitar Effect Looper Station Using Dip Switches : 11 Steps - Instructables