A harmony pedal is an effects device used by musicians, particularly vocalists and guitarists, to create and add harmonic layers to their performance. It achieves this by generating additional pitches or harmonies based on the input signal, allowing musicians to enrich their sound with harmonized notes that complement the original melody.

In vocal applications, a harmony pedal can take a singer’s voice and generate harmonies in real-time, creating the effect of multiple vocalists singing in unison or harmony.

For guitarists, harmony pedals can analyze the pitch of the guitar signal and produce harmonized notes that follow the chord progression or scale being played, adding depth and complexity to solos or rhythm parts.

Many harmony pedals offer adjustable settings for the number of harmonies, the interval between notes, and key or scale adjustments, providing musicians with a wide range of creative possibilities. This makes harmony pedals a powerful tool for enhancing live performances and recording sessions, adding a rich, multi-dimensional quality to the sound.