A flanger pedal is an effects device used by musicians, particularly guitarists, to create a unique sound by modulating the audio signal. It works by mixing the original signal with a delayed version of itself, which is then altered in time. This results in a sweeping, jet-like effect that can add depth and texture to music. Flanger pedals often feature controls for adjusting the depth, rate, and feedback of the effect. Popular among genres like rock and electronic music, they can be found in the setups of many famous musicians, including Jimi Hendrix and David Gilmour.