harmony parts
theoryHAR-moh-nee PARTS
Additional vocal or instrumental lines that support a melody by adding complementary pitches.
Harmony parts are vocal or instrumental lines performed alongside the main melody, adding depth, richness, and emotional colour through the simultaneous sounding of different but complementary pitches. In vocal music, harmony singing typically involves one or more singers performing above (in parallel thirds or sixths) or below the melody. Close harmony, where the parts are tightly spaced, creates a rich, blended sound heard in barbershop quartets and groups like the Beach Boys. In choral music, four-part harmony (soprano, alto, tenor, bass) is the standard framework. Instrumental harmony parts include guitar double-stops, brass section arrangements, and string pads. Writing effective harmony parts requires understanding of intervals, chord tones, voice leading, and the relationship between the harmony and the underlying chord progression. Great harmony parts enhance a melody without competing with it.
The Everly Brothers' close harmony singing in the 1950s directly influenced the Beatles, the Beach Boys, and Simon & Garfunkel — transforming the sound of popular music.