A buffer is a circuit designed to preserve signal strength and clarity as it passes through a signal chain. It converts a high-impedance signal into a low-impedance one, helping prevent tone loss caused by long cable runs or multiple pedals.

Buffers are commonly used at the beginning or end of a pedalboard to maintain high-end detail and consistent response. They are especially useful in complex rigs, ensuring the original character of the instrument remains intact regardless of cable length or pedal count.