A/B Switch

An A/B switch is a switch with one input and two outputs: A and B. Using the switch, the user can manually select which output the input will feed. (In many cases, an A/B switch can also be used in reverse, selecting between two inputs to feed one output.) When it comes to music gear, A/B switches are often used in pedal form to, for example, switch a single guitar between two signal paths, such as two different guitar amps or chains of stompboxes.