Vocal harmony is a style of vocal music in which a

consonant In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract. Examples are and pronounced with the lips; and pronounced with the front of the tongue; and pronounced w ...

note or notes are simultaneously sung as a main melody in a predominantly homophonic texture. Vocal

harmonies In music, harmony is the process by which individual sounds are joined together or composed into whole units or compositions. Often, the term harmony refers to simultaneously occurring frequencies, pitches ( tones, notes), or chords. Howev ...

are used in many subgenres of European art music, including Classical choral music and

opera Opera is a form of theatre in which music is a fundamental component and dramatic roles are taken by singers. Such a "work" (the literal translation of the Italian word "opera") is typically a collaboration between a composer and a libr ...

and in the popular styles from many Western cultures ranging from folk songs and musical theater pieces to rock ballads. In the simplest style of vocal harmony, the main vocal melody is supported by a single backup vocal line, either at a pitch which is above or below the main vocal line, often in thirds or sixths which fit in with the chord progression used in the song. In more complex vocal harmony arrangements, different backup singers may sing two or even three other notes at the same time as each of the main melody notes, mostly with consonant, pleasing-sounding thirds, sixths, and fifths (although dissonant notes may be used as short

passing note A nonchord tone (NCT), nonharmonic tone, or embellishing tone is a note in a piece of music or song that is not part of the implied or expressed chord set out by the harmonic framework. In contrast, a chord tone is a note that is a part of the ...

s).

In art music

Vocal harmonies have been an important part of Western art music since the Renaissance-era introduction of

Mass Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different ele ...

melodies harmonized in sweet thirds and sixths. With the rise of the

Lutheran church Lutheranism is one of the largest branches of Protestantism, identifying primarily with the theology of Martin Luther, the 16th-century German monk and reformer whose efforts to reform the theology and practice of the Catholic Church launched th ...

's chorale

hymn A hymn is a type of song, and partially synonymous with devotional song, specifically written for the purpose of adoration or prayer, and typically addressed to a deity or deities, or to a prominent figure or personification. The word ''hymn ...

singing style, congregations sang hymns arranged with four or five-part vocal harmony. In the Romantic era of music during the 1800s, vocal harmonization became more complex, and arrangers began including more dissonant harmonies. Operas and choral music from the Romantic era used tense-sounding vocal harmonies with augmented and diminished intervals as an important tool for underscoring the drama of the music. With contemporary music from the 1900s and 2000s, composers made increasingly difficult demands on

choir A choir ( ; also known as a chorale or chorus) is a musical ensemble of singers. Choral music, in turn, is the music written specifically for such an ensemble to perform. Choirs may perform music from the classical music repertoire, which sp ...

s which were singing in vocal harmony, such as instructions to sing microtonal notes or make percussive sounds.

In popular music

To sing vocal harmony in a pop or rock context, backup singers need to be able to adjust the pitch of their notes so that they are in tune with the pitch of the lead vocalist and the band's instruments. As well, the rhythm of the backup harmony parts has to be in time with the lead singer and the

rhythm section A rhythm section is a group of musicians within a music ensemble or band that provides the underlying rhythm, harmony and pulse of the accompaniment, providing a rhythmic and harmonic reference and "beat" for the rest of the band. The rhyth ...

. While some bands use relatively simple harmony vocals, with long, slow-moving vocal harmony notes supporting the vocal lead during the chorus sections, other bands make the backup singers into more equal partners of the main vocalist. In more vocally oriented bands, backup singers may have to sing complex parts which demand a vocal agility and sensitivity equal to that of the main vocal line. Usually, pop and rock bands use harmony vocals while the rest of the band is playing; however, as an effect, some rock and pop harmony vocals are done

a cappella ''A cappella'' (, also , ; ) music is a performance by a singer or a singing group without instrumental accompaniment, or a piece intended to be performed in this way. The term ''a cappella'' was originally intended to differentiate between Ren ...

, without instrumental accompaniment. This device became widely used in the end chorus section of 1980s and 1990s-era

hard rock Hard rock or heavy rock is a loosely defined subgenre of rock music typified by aggressive vocals and distorted electric guitars. Hard rock began in the mid-1960s with the garage, psychedelic and blues rock movements. Some of the earliest ha ...

and heavy metal ballads as well as horror punk (which cites influence from both heavy metal and

doo-wop Doo-wop (also spelled doowop and doo wop) is a genre of rhythm and blues music that originated in African-American communities during the 1940s, mainly in the large cities of the United States, including New York, Philadelphia, Pittsburgh, Chica ...

Other roles

While some bands use backup singers who only sing when they are on stage, it is common for backup singers to have other roles while they are on stage. In many rock and metal bands, the musicians doing backup vocals also play instruments, such as keyboards,

rhythm guitar In music performances, rhythm guitar is a technique and role that performs a combination of two functions: to provide all or part of the rhythmic pulse in conjunction with other instruments from the rhythm section (e.g., drum kit, bass guitar ...

bass Bass or Basses may refer to: Fish * Bass (fish), various saltwater and freshwater species Music * Bass (sound), describing low-frequency sound or one of several instruments in the bass range: ** Bass (instrument), including: ** Acoustic bass gui ...

drums A drum kit (also called a drum set, trap set, or simply drums) is a collection of drums, cymbals, and other auxiliary percussion instruments set up to be played by one person. The player (drummer) typically holds a pair of matching drumsticks ...

. In

Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...

or Afro-Cuban groups, backup singers may play percussion instruments or shakers while singing. In some pop and hip-hop groups and in musical theater, the backup singers may be required to perform elaborately choreographed dance routines while they sing through headset microphones.

Barbershop quartets

One of the more complex styles of vocal harmony is the

barbershop quartet A barbershop quartet is a group of four singers who sing music in the barbershop style, characterized by four-part harmony without instrumental accompaniment, or a cappella. The four voices are: the lead, the vocal part which typically carries t ...

style, in which the melody is harmonized in four parts. In a barbershop quartet arrangement, each voice has its own role: generally, the

lead Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, ...

sings the melody, the tenor harmonizes above the melody, the

sings the lowest harmonizing notes, and the

baritone A baritone is a type of classical male singing voice whose vocal range lies between the bass and the tenor voice-types. The term originates from the Greek (), meaning "heavy sounding". Composers typically write music for this voice in the ...

completes the chord, usually below the lead. The melody is not usually sung by the tenor or bass. Barbershop quartets are more likely to use dissonant and "tense"-sounding

dominant seventh chord In music theory, a dominant seventh chord, or major minor seventh chord, is a seventh chord, usually built on the fifth degree of the major scale, and composed of a root, major third, perfect fifth, and minor seventh. Thus it is a major tri ...

s than pop or rock bands.

Doo-wop groups

Doo-wop Doo-wop (also spelled doowop and doo wop) is a genre of rhythm and blues music that originated in African-American communities during the 1940s, mainly in the large cities of the United States, including New York, Philadelphia, Pittsburgh, Chica ...

is a style of vocal-based

rhythm and blues Rhythm and blues, frequently abbreviated as R&B or R'n'B, is a genre of popular music that originated in African-American communities in the 1940s. The term was originally used by record companies to describe recordings marketed predominantly ...

music, which developed in African-American communities in the 1940s and which achieved mainstream popularity in the US both in the 1950s to the early 1960s. It used smooth, consonant vocal harmonies, with a number of singers imitating instruments while singing nonsense syllables. For example, in

The Ravens ''The'' () is a grammatical article in English, denoting persons or things already mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the ...

' song "

Count Every Star "Count Every Star" is a song written by Bruno Coquatrix and Sammy Gallop and first released by Ray Anthony and His Orchestra. It reached number 4 on the US pop chart in 1950. Other charting versions *Hugo Winterhalter released a version of the ...

" (1950), the singers imitate the "doomph", "doomph" plucking-sound of a

double bass The double bass (), also known simply as the bass () (or #Terminology, by other names), is the largest and lowest-pitched Bow (music), bowed (or plucked) string instrument in the modern orchestra, symphony orchestra (excluding unorthodox addit ...

. Well-known hits include " In the Still of the Night (I Remember)" by

The Five Satins The Five Satins are an American doo-wop group, best known for their 1956 million-selling song, " In the Still of the Night." They were formed in 1954 and continued performing until 1994. When it was formed, the group consisted of six members, ...

and " Get a Job" by

The Silhouettes The Silhouettes were an American doo wop/ R&B group, whose single " Get a Job" was a number 1 hit on the ''Billboard'' R&B singles chart and pop singles chart in 1958. The doo-wop revival group Sha Na Na derived their name from the song's lyri ...

, a hit in 1958. Doo-wop remained popular until just before the

British Invasion The British Invasion was a cultural phenomenon of the mid-1960s, when rock and pop music acts from the United Kingdom and other aspects of British culture became popular in the United States and significant to the rising "counterculture" o ...

of 1964.

References