Close harmony is an arrangement of the notes of chords within a narrow range. It is different from open voicing in that it uses each part on the closest harmonizing note (such as - C4, E4, G4), while the open voicing uses a broader pitch array (like - C3, G3, E4) expanding the harmonic range past the octave. Close harmony or voicing can refer to both instrumental and vocal arrangements. It can follow the standard voice-leading rules of classical harmony, as in string quartets or Bach's Chorales, or proceed in parallel motion with the melody in 3rds or 6ths. Impressionist composers like Claude Debussy and Maurice Ravel often used this voicing in their works and other intervals, such as 7ths, 9ths, and 11ths may be used, since the chords have 4 or more notes and the harmonies are more complex. In jazz, this influence is reflected in George Gershwin's work.

Vocal

Barbershop quartets, like the Buffalo Bills, and other a cappella music groups commonly use close harmony. Some other examples include the Andrews Sisters, the Boswell Sisters, the Revelers, the Comedian Harmonists, the Mills Brothers, the Everly Brothers, the Pied Pipers, the McGuire Sisters, and the Lescano Trio. Many gospel and soul groups in the 1950's and 60's also used this technique, usually 3- or 4-part SSAA or TTBB harmony with one person (either Bass or Lead) doing a call-and-response type lead. One example of this is Five Blind Boys of Alabama, a group that is still recording today.

Barbershop harmony has a unique TTBB structure - the melody is in the 2nd tenor or "lead" voice, while the 1st tenor takes the next part up, usually in 3rds, with the baritone and bass voices supporting. The bass line tends to be more rhythmic and covers the root notes of the harmonic progression, providing more "support" and independence than in Classical vocal music, since Barbershop is usually sung a cappella. Barbershop can be sung by males (TTBB) or females (SSAA). There are many public domain pieces—such as "Sweet Adeline"—and newer pieces. There are also national organizations to promote the music with local chapters in many communities.

Soul and gospel groups flourished in America in the years after WWII, building on the foundation of blues, 1930's gospel songs and big band music. Originally called "race music" by white mainstream radio and its target market, they were the precursors to rock and roll and rhythm and blues of the 1960s and 1970s, influencing many English and American artists of that era. As noted above, they often used the more traditional TTBB pr SSAA 4-part structure, but with heavy use of solos and call-and-response, which is rooted in the African American church. These groups sometimes sang a cappella but also used more instrumentatal backing, especially when recorded by the bigger labels. Pop music and doo-wop --like the musical Jersey Boys—can be seen as a commercialization of this genre.

Instrumental

A well-known example of consistent instrumental close harmony is Glenn Miller's "Moonlight Serenade" which uses the full range of single-reed wind instruments (soprano and bass clarinets, soprano, tenor, and bass saxophones) to make a distinctive sound by harmonizing the different sections all within a single octave. The technique became the hallmark of Miller's "sound".

Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Close harmony". Image Credit.

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