Key (music)
Encyclopedia
In music theory
Music theory
Music theory is the study of how music works. It examines the language and notation of music. It seeks to identify patterns and structures in composers' techniques across or within genres, styles, or historical periods...

, the term key is used in many different and sometimes contradictory ways. A common use is to speak of music as being "in" a specific key, such as in the key of C major or in the key of F-sharp. Sometimes the terms "major" or "minor" are appended, as in the key of A minor or in the key of B-flat major. Although the concept of musical key can be a complicated subject when examined closely, broadly speaking the phrase in key of C means that C is music's harmonic
Harmony
In music, harmony is the use of simultaneous pitches , or chords. The study of harmony involves chords and their construction and chord progressions and the principles of connection that govern them. Harmony is often said to refer to the "vertical" aspect of music, as distinguished from melodic...

 center or tonic
Tonic (music)
In music, the tonic is the first scale degree of the diatonic scale and the tonal center or final resolution tone. The triad formed on the tonic note, the tonic chord, is thus the most significant chord...

. Note that the letter-name "C" does not indicate a single specific pitch
Pitch (music)
Pitch is an auditory perceptual property that allows the ordering of sounds on a frequency-related scale.Pitches are compared as "higher" and "lower" in the sense associated with musical melodies,...

 but rather all pitches with the letter name
Letter notation
In music, letter notation is a system of representing a set of pitches, for example, the notes of a scale, by letters. For the complete Western diatonic scale, for example, these would be the letters A-G, possibly with a trailing symbol to indicate a half-step raise--, or a half-step lowering...

 C (sometimes called a pitch class
Pitch class
In music, a pitch class is a set of all pitches that are a whole number of octaves apart, e.g., the pitch class C consists of the Cs in all octaves...

). The terms "major" and "minor" further imply the use of a major scale
Major scale
In music theory, the major scale or Ionian scale is one of the diatonic scales. It is made up of seven distinct notes, plus an eighth which duplicates the first an octave higher. In solfege these notes correspond to the syllables "Do, Re, Mi, Fa, Sol, La, Ti/Si, ", the "Do" in the parenthesis at...

 or a minor scale
Minor scale
A minor scale in Western music theory includes any scale that contains, in its tonic triad, at least three essential scale degrees: 1) the tonic , 2) a minor-third, or an interval of a minor third above the tonic, and 3) a perfect-fifth, or an interval of a perfect fifth above the tonic, altogether...

. Thus the phrase in the key of E major implies a piece of tonal
Tonality
Tonality is a system of music in which specific hierarchical pitch relationships are based on a key "center", or tonic. The term tonalité originated with Alexandre-Étienne Choron and was borrowed by François-Joseph Fétis in 1840...

 music harmonically centered on the note E and making use of a major scale whose first note, or tonic, is E. Although the term "key" is commonly used this way, actual music can rarely be described so simply. This overview of the term also makes many assumptions and may not hold true for all forms of music.

A key relationship is the relationship between keys, measured by common tone
Common tone
In music a common tone is a pitch class that is a member of, or common to, a musical scale and a transposition of that scale, as in modulation...

s and nearness on the circle of fifths
Circle of fifths
In music theory, the circle of fifths shows the relationships among the 12 tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys...

. See: closely related key
Closely related key
In music, a closely related key is one sharing many common tones with an original key, as opposed to a distantly related key...

.

Keys and tonality

The key identifies the tonic triad
Tonality
Tonality is a system of music in which specific hierarchical pitch relationships are based on a key "center", or tonic. The term tonalité originated with Alexandre-Étienne Choron and was borrowed by François-Joseph Fétis in 1840...

, the chord
Chord (music)
A chord in music is any harmonic set of two–three or more notes that is heard as if sounding simultaneously. These need not actually be played together: arpeggios and broken chords may for many practical and theoretical purposes be understood as chords...

, major or minor, which represents the final point of rest for a piece, or the focal point of a section. Although the key of a piece may be named in the title (e.g., Symphony in C), or inferred from the key signature
Key signature
In musical notation, a key signature is a series of sharp or flat symbols placed on the staff, designating notes that are to be consistently played one semitone higher or lower than the equivalent natural notes unless otherwise altered with an accidental...

, the establishment of key is brought about via functional harmony
Diatonic function
In tonal music theory, a diatonic function is the specific, recognized role of each of the 7 notes and their chords in relation to the diatonic key...

, a sequence of chords leading to one or more cadences
Cadence (music)
In Western musical theory, a cadence is, "a melodic or harmonic configuration that creates a sense of repose or resolution [finality or pause]." A harmonic cadence is a progression of two chords that concludes a phrase, section, or piece of music...

. A key may be major or minor; music can be described as being in the Dorian mode
Dorian mode
Due to historical confusion, Dorian mode or Doric mode can refer to three very different musical modes or diatonic scales, the Greek, the medieval, and the modern.- Greek Dorian mode :...

, or Phrygian
Phrygian mode
The Phrygian mode can refer to three different musical modes: the ancient Greek tonos or harmonia sometimes called Phrygian, formed on a particular set octave species or scales; the Medieval Phrygian mode, and the modern conception of the Phrygian mode as a diatonic scale, based on the latter...

, et cetera, and is thus usually considered to be in a specific mode rather than a key. When a particular key is not being described in the English language
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

, different key naming systems
Key signature names and translations
When a particular musical key or key signature is not described in the English language, there are two main systems that are used instead:# Fixed do solmization - used in Italian, French , Spanish and Russian key references....

 may be used.

Although many musicians confuse key with scale, a scale is an ordered set of notes typically used in a key, while the key is the center of gravity, established by particular chord progressions.

The chords used within a key are generally drawn from the major
Major scale
In music theory, the major scale or Ionian scale is one of the diatonic scales. It is made up of seven distinct notes, plus an eighth which duplicates the first an octave higher. In solfege these notes correspond to the syllables "Do, Re, Mi, Fa, Sol, La, Ti/Si, ", the "Do" in the parenthesis at...

 or minor scale
Minor scale
A minor scale in Western music theory includes any scale that contains, in its tonic triad, at least three essential scale degrees: 1) the tonic , 2) a minor-third, or an interval of a minor third above the tonic, and 3) a perfect-fifth, or an interval of a perfect fifth above the tonic, altogether...

 associated with the tonic triad, but may also include borrowed chord
Borrowed chord
A borrowed chord is a chord borrowed from the parallel key . Borrowed chords are typically used as "color chords", providing variety through contrasting scale forms, major and the three forms of minor...

s, altered chord
Altered chord
In music, an altered chord, an example of alteration, is a chord with one or more diatonic notes replaced by, or altered to, a neighboring pitch in the chromatic scale...

s, secondary dominant
Secondary dominant
Secondary dominant is an analytical label for a specific harmonic device, prevalent in the tonal idiom of Western music beginning in the common practice period...

s, and the like. All of these chords, however, are used in conventional patterns which serve to establish the primacy of the tonic triad.

Cadences
Cadence (music)
In Western musical theory, a cadence is, "a melodic or harmonic configuration that creates a sense of repose or resolution [finality or pause]." A harmonic cadence is a progression of two chords that concludes a phrase, section, or piece of music...

 are particularly important in the establishment of key. Even cadences which do not include the tonic triad, such as half cadences and deceptive cadences, serve to establish key because those chord sequences imply a unique diatonic context.

Short pieces may stay in a single key throughout. A typical pattern for a simple song
Song
In music, a song is a composition for voice or voices, performed by singing.A song may be accompanied by musical instruments, or it may be unaccompanied, as in the case of a cappella songs...

 might be as follows: a phrase
Phrase (music)
In music and music theory, phrase and phrasing are concepts and practices related to grouping consecutive melodic notes, both in their composition and performance...

 ends with a cadence on the tonic, a second phrase ends with a half cadence, then a final, longer, phrase ends with an authentic cadence on the tonic.

More elaborate pieces may establish the main key, then modulate
Modulation (music)
In music, modulation is most commonly the act or process of changing from one key to another. This may or may not be accompanied by a change in key signature. Modulations articulate or create the structure or form of many pieces, as well as add interest...

 to another key, or a series of keys, then back to the original key. In the Baroque it was common to repeat an entire phrase of music, called a ritornello
Ritornello
A ritornello is a recurring passage in Baroque music for orchestra or chorus. The first or final movement of a solo concerto or aria may be in "ritornello form", in which the ritornello is the opening theme, always played by tutti, which returns in whole or in part and in different keys throughout...

, in each key once it was established. In Classical sonata form
Sonata form
Sonata form is a large-scale musical structure used widely since the middle of the 18th century . While it is typically used in the first movement of multi-movement pieces, it is sometimes used in subsequent movements as well—particularly the final movement...

, the second key was typically marked with a contrasting theme. Another key may be treated as a temporary tonic, called tonicization
Tonicization
In music, tonicization is the treatment of a pitch other than the overall tonic as a temporary tonic in a composition. Tonicization is achieved through the use of the scale and harmonies of the tonicized key. The most common method of tonicization uses leading tones, dominant-tonic chord...

.

In common practice period
Common practice period
The common practice period, in the history of Western art music , spanning the Baroque, Classical, and Romantic periods, lasted from c. 1600 to c. 1900.-General characteristics:...

 compositions, and most of the Western popular music of the 20th century, pieces always begin and end in the same key, even if (as in some Romantic-era
Romantic music
Romantic music or music in the Romantic Period is a musicological and artistic term referring to a particular period, theory, compositional practice, and canon in Western music history, from 1810 to 1900....

 music) the key is deliberately left ambiguous at first. Some arrangements of popular songs, however, will shift up a half-step or a whole step sometime during the song (often in a repeat of the final chorus
Refrain
A refrain is the line or lines that are repeated in music or in verse; the "chorus" of a song...

) and thus will end in a different key. This is an example of modulation
Modulation (music)
In music, modulation is most commonly the act or process of changing from one key to another. This may or may not be accompanied by a change in key signature. Modulations articulate or create the structure or form of many pieces, as well as add interest...

.

In rock
Rock music
Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music...

 and popular music
Popular music
Popular music belongs to any of a number of musical genres "having wide appeal" and is typically distributed to large audiences through the music industry. It stands in contrast to both art music and traditional music, which are typically disseminated academically or orally to smaller, local...

 some pieces, "tend to float back and forth between two keys," with examples including Fleetwood Mac
Fleetwood Mac
Fleetwood Mac are a British–American rock band formed in 1967 in London.The only original member present in the band is its eponymous drummer, Mick Fleetwood...

's "Dreams
Dreams (Fleetwood Mac song)
"Dreams" is a song written by singer Stevie Nicks, for the group Fleetwood Mac's 1977 album, Rumours. The song was the only U.S. number one hit for the group, and remains one of their best known songs.-Background and writing:...

" and The Rolling Stones
The Rolling Stones
The Rolling Stones are an English rock band, formed in London in April 1962 by Brian Jones , Ian Stewart , Mick Jagger , and Keith Richards . Bassist Bill Wyman and drummer Charlie Watts completed the early line-up...

' "Under My Thumb
Under My Thumb
"Under My Thumb" is a song written by Mick Jagger and Keith Richards for The Rolling Stones. Its first appearance was as an album track on 1966's Aftermath...

". "This phenomenon occurs when a feature that allows multiple interpretations of key (usually a diatonic set as pitch source) is accompanied by other, more precise evidence in support of each possible interpretation (such as the use of one note as the root
Root (chord)
In music theory, the root of a chord is the note or pitch upon which a triadic chord is built. For example, the root of the major triad C-E-G is C....

 of the initiating harmony and persistent use of another note as pitch of melodic resolution and root of the final harmony of each phrase)." Most commonly between relative major
Relative key
In music, relative keys are the major and minor scales that have the same key signatures. A major and minor scale sharing the same key signature are said to be in a relative relationship...

 and minor, which share, "exactly the same pitch classes," such as C Ionian and A Aeolian.

Examples of, "songs employing a fourth relationship include," the Buckinghams
The Buckinghams
The Buckinghams are an American Sunshine Pop band from Chicago, Illinois. They formed in 1966 and went on to become one of the top selling acts of 1967. The band dissolved in 1970 but reformed in 1980 and continue to tour throughout the United States....

's "Kind Of A Drag
Kind of a Drag
"Kind of a Drag" is a song written by Jim Holvay and recorded by The Buckinghams. The single reached number one on the U.S. Billboard Hot 100 in February 1967, becoming the first #1 single within the new calendar year and remaining in the top position for two weeks...

", the Corrs
The Corrs
The Corrs are an Irish band which combine pop rock with traditional Celtic folk music. The brother and sisters are from Dundalk, Ireland. The group consists of the Corr siblings: Andrea ; Sharon ; Caroline ; and Jim .The Corrs came to international prominence with their performance at the...

' "Breathless", and Paul Simon
Paul Simon
Paul Frederic Simon is an American singer-songwriter and guitarist.Simon is best known for his success, beginning in 1965, as part of the duo Simon & Garfunkel, with musical partner Art Garfunkel. Simon wrote most of the pair's songs, including three that reached number one on the US singles...

's "Kodachrome
Kodachrome (song)
"Kodachrome" is a song written and recorded by Paul Simon. It appeared on his 1973 album There Goes Rhymin' Simon.-Description:The song is named after the Kodak 35mm film Kodachrome...

".

"Songs whose main sections [often verse and chorus] juxtapose keys of a chromatic third relationship include,"
  • minor third: the Doobie Brothers
    The Doobie Brothers
    The Doobie Brothers are an American rock band. The group has sold over 40 million units worldwide throughout their career. The Doobie Brothers were inducted into The Vocal Group Hall of Fame in 2004.-Original incarnation:...

    ' "What A Fool Believes
    What a Fool Believes
    "What a Fool Believes" is a song written by Michael McDonald and Kenny Loggins. The best-known version was recorded by The Doobie Brothers for their 1978 album Minute by Minute. The single reached number one on the Billboard Hot 100 on April 14, 1979, remaining in that position for one week...

    ", Chicago
    Chicago (band)
    Chicago is an American rock band formed in 1967 in Chicago, Illinois. The self-described "rock and roll band with horns" began as a politically charged, sometimes experimental, rock band and later moved to a predominantly softer sound, becoming famous for producing a number of hit ballads. They had...

    's "(I've Been) Searchin' So Long
    (I've Been) Searchin' So Long
    " Searchin' So Long" is a song written by James Pankow for the group Chicago and recorded for their album Chicago VII . The first single released from that album, it reached number 9 on the U.S. Billboard Hot 100....

    ", The Beatles
    The Beatles
    The Beatles were an English rock band, active throughout the 1960s and one of the most commercially successful and critically acclaimed acts in the history of popular music. Formed in Liverpool, by 1962 the group consisted of John Lennon , Paul McCartney , George Harrison and Ringo Starr...

    ' "Something
    Something
    "Something" is a song by The Beatles, written by lead guitarist George Harrison in 1969. It was featured on the album Abbey Road, and was also the first song written by Harrison to appear on the A-side of a Beatles' single...

    ", and Diana Ross
    Diana Ross
    Diana Ernestine Earle Ross is an American singer, record producer, and actress. Ross was lead singer of the Motown group The Supremes during the 1960s. After leaving the group in 1970, Ross began a solo career that included successful ventures into film and Broadway...

    ' "Upside Down
    Upside Down
    "Upside Down" is a hit song by Diana Ross released on the Motown label. It was the first single taken from her 1980 album diana and hit number one on the Billboard Hot 100 on September 6, 1980. It also hit number one on the Billboard Disco/Dance and R&B charts...

    ".
  • major third: Steve Winwood
    Steve Winwood
    Stephen Lawrence "Steve" Winwood is an English international recording artist whose career spans nearly 50 years. He is a songwriter and a musician whose genres include soul music , R&B, rock, blues-rock, pop-rock, and jazz...

    's "While You See A Chance
    While You See a Chance
    "While You See a Chance" is a song performed by Steve Winwood in 1980, who also wrote it alongside Will Jennings. It was released on his album Arc of a Diver and peaked at #7 on the Billboard Hot 100 in April 1981, and also reached #68 on the Billboard Top 100 for the year 1981, however it only...

    ", Sanford Townsend Band
    Sanford-Townsend Band
    The Sanford-Townsend Band was a successful rock and roll band in the United States. They are considered a one-hit wonder who scored a hit single in 1977 with "Smoke from a Distant Fire".-History:...

    's "Smoke Of A Distant Fire", The Guess Who
    The Guess Who
    The Guess Who are a Canadian rock band from Winnipeg, Manitoba. Initially gaining recognition in Canada, they also found international success from the late 1960s through the mid-1970s with numerous hit singles, including "American Woman", "These Eyes" and "Share the Land"...

    's "Hand Me Down World
    Share the Land
    Share the Land is an album released in 1970 by Canadian rock band The Guess Who. After the departure of Randy Bachman, the band brought in two guitarists, Kurt Winter and Greg Leskiw....

    ", and Duran Duran
    Duran Duran
    Duran Duran are an English band, formed in Birmingham in 1978. They were one of the most successful bands of the 1980s and a leading band in the MTV-driven "Second British Invasion" of the United States...

    's "Hungry Like The Wolf
    Hungry Like the Wolf
    "Hungry Like the Wolf" is a song by the British New Wave band Duran Duran. Written by the band members, the song was produced by Colin Thurston for the group's second studio album Rio . The song was released in May 1982 as the band's fifth single in the United Kingdom...

    ".


"Songs whose major sections juxtapose keys sharing a chromatic second relationship include,"
  • minor second: The Beach Boys
    The Beach Boys
    The Beach Boys are an American rock band, formed in 1961 in Hawthorne, California. The group was initially composed of brothers Brian, Dennis and Carl Wilson, their cousin Mike Love, and friend Al Jardine. Managed by the Wilsons' father Murry, The Beach Boys signed to Capitol Records in 1962...

    ' "Don't Worry, Baby
    Don't Worry Baby
    "Don’t Worry Baby" is a song written by Brian Wilson and Roger Christian, produced by Wilson and first recorded by the Beach Boys. The band's version, a tender ballad with falsetto lead vocal by Brian, was first released on their 1964 album Shut Down Volume 2. It was also released as the B-side of...

    ".
  • major second: Bread
    Bread (band)
    Bread was a rock band from Los Angeles, California. They placed 13 songs on the Billboard Hot 100 chart between 1970 and 1977 and were a prime example of what later was labeled soft rock....

    's "It Don't Matter To Me
    Bread (album)
    Bread is the self-titled debut album by soft rock band Bread, released in 1969.Bread peaked at #127 on Billboard's Pop Albums chart. A remake of "It Don't Matter to Me" charted in 1970 after the release of Bread's second album...

    ", Bee Gees
    Bee Gees
    The Bee Gees are a musical group that originally comprised three brothers: Barry, Robin, and Maurice Gibb. The trio was successful for most of their 40-plus years of recording music, but they had two distinct periods of exceptional success: as a pop act in the late 1960s and early 1970s, and as a...

    ' "I've Got to Get a Message To You
    I've Gotta Get a Message to You
    "I've Gotta Get a Message to You" is a song recorded by The Bee Gees in 1968, which became their second number-one single on the UK Singles Chart, and reached number eight on the U.S. pop chart....

    ", and Huey Lewis and the News
    Huey Lewis and the News
    Huey Lewis and the News is an American rock band based in San Francisco, California. They had a run of hit singles during the 1980s and early 1990s, eventually scoring a total of 19 top-ten singles across the Billboard Hot 100, Adult Contemporary and Mainstream Rock charts...

    ' "Stuck With You
    Stuck with You
    "Stuck with You" is the title of a hit single by Huey Lewis and the News, written by guitarist Chris Hayes and lead singer Huey Lewis, from 1986. It was the first single from the band's fourth album, Fore!. The song spent three weeks at number one on the Billboard Hot 100 from September 20, 1986,...

    ".

Instruments in a key

Certain musical instrument
Musical instrument
A musical instrument is a device created or adapted for the purpose of making musical sounds. In principle, any object that produces sound can serve as a musical instrument—it is through purpose that the object becomes a musical instrument. The history of musical instruments dates back to the...

s are sometimes said to play in a certain key, or have their music written in a certain key. Instruments which do not play in the key of C are known as transposing instrument
Transposing instrument
A transposing instrument is a musical instrument for which written notes are read at a pitch different from the corresponding concert pitch, which a non-transposing instrument, such as a piano, would play. Playing a written C on a transposing instrument will produce a note other than concert C...

s. The most common kind of clarinet
Clarinet
The clarinet is a musical instrument of woodwind type. The name derives from adding the suffix -et to the Italian word clarino , as the first clarinets had a strident tone similar to that of a trumpet. The instrument has an approximately cylindrical bore, and uses a single reed...

, for example, is said to play in the key of B-flat. This means that a scale written in C major in sheet music
Sheet music
Sheet music is a hand-written or printed form of music notation that uses modern musical symbols; like its analogs—books, pamphlets, etc.—the medium of sheet music typically is paper , although the access to musical notation in recent years includes also presentation on computer screens...

 will actually sound as a B-flat major scale when played on the B-flat clarinet; that is, notes sound a whole tone lower than written. Likewise, the horn
Horn (instrument)
The horn is a brass instrument consisting of about of tubing wrapped into a coil with a flared bell. A musician who plays the horn is called a horn player ....

, normally in the key of F, sounds notes a perfect fifth
Perfect fifth
In classical music from Western culture, a fifth is a musical interval encompassing five staff positions , and the perfect fifth is a fifth spanning seven semitones, or in meantone, four diatonic semitones and three chromatic semitones...

 lower than written.

Similarly, some instruments may be said to be built in a certain key. For example, a brass instrument
Brass instrument
A brass instrument is a musical instrument whose sound is produced by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player's lips...

 built in B-flat will play a fundamental
Fundamental
Fundamental may refer to:* Foundation of reality* Fundamental frequency, as in music or phonetics, often referred to as simply a "fundamental"...

 note of B-flat, and will be able to play notes in the harmonic series
Harmonic series (music)
Pitched musical instruments are often based on an approximate harmonic oscillator such as a string or a column of air, which oscillates at numerous frequencies simultaneously. At these resonant frequencies, waves travel in both directions along the string or air column, reinforcing and canceling...

 starting on B-flat without using valves, fingerholes, or slides or otherwise altering the length of the vibrating column of air. An instrument built in a certain key will often, but not always, have its music written in the same key (see trombone
Trombone
The trombone is a musical instrument in the brass family. Like all brass instruments, sound is produced when the player’s vibrating lips cause the air column inside the instrument to vibrate...

 for an exception). However, some instruments, such as the diatonic harmonica
Harmonica
The harmonica, also called harp, French harp, blues harp, and mouth organ, is a free reed wind instrument used primarily in blues and American folk music, jazz, country, and rock and roll. It is played by blowing air into it or drawing air out by placing lips over individual holes or multiple holes...

 and the harp
Harp
The harp is a multi-stringed instrument which has the plane of its strings positioned perpendicularly to the soundboard. Organologically, it is in the general category of chordophones and has its own sub category . All harps have a neck, resonator and strings...

, are in fact designed to play in only one key at a time: accidentals
Accidental (music)
In music, an accidental is a note whose pitch is not a member of a scale or mode indicated by the most recently applied key signature. In musical notation, the symbols used to mark such notes, sharps , flats , and naturals , may also be called accidentals...

 are difficult or impossible to play.

In Western musical composition, the key of a song has important ramifications for its composition:
  • As noted earlier, certain instruments are said to be designed for a certain key, as playing in that key can be physically easier or harder. Thus the choice of key can be an important one when composing for an orchestra, as one must take these elements into consideration.
  • In the life of the professional clarinettist, for example, it is common to carry two instruments tuned a semitone apart (B-flat and A) to cope with the needs of composers: Mozart's well-known clarinet concerto
    Clarinet concerto
    A clarinet concerto is a piece for clarinet and orchestra . Albert Rice has identified a work by Giuseppe Antonio Paganelli as possibly the earliest known concerto for solo clarinet; its score appears to be titled "Concerto per Clareto" and may date from 1733. It may, however, be intended for...

     is in A Major. To play it on a B-flat instrument would be difficult, and to rewrite all the orchestral parts to allow the piece to be played in B-flat major would be an enormous effort. Even so, it is not unheard of for a piece published in B-flat to include notes a semitone (or more) below the range of the common B-flat clarinet. The piece must then be played on a more exotic instrument, or transposed by hand (or at sight) for the slightly larger 'A' clarinet. There are clarinets with an extended range, with a longer bore and additional keys.
  • Besides this though, the timbre
    Timbre
    In music, timbre is the quality of a musical note or sound or tone that distinguishes different types of sound production, such as voices and musical instruments, such as string instruments, wind instruments, and percussion instruments. The physical characteristics of sound that determine the...

     of almost any instrument is not exactly the same for all notes played on that instrument. For this reason a song that might be in the key of C might sound or "feel" somewhat different (besides being in a different pitch) to an observer if it is transposed to the key of A.
  • In addition, since many composers often utilized the piano while composing, the key chosen can possibly have an effect over the composing. This is because the physical fingering is different for each key, which may lend itself to choosing to play and thus eventually write certain notes or chord progressions compared to others, or this may be done on purpose to make the fingering more efficient if the final piece is intended for piano.
  • In music that does not use equal temperament
    Equal temperament
    An equal temperament is a musical temperament, or a system of tuning, in which every pair of adjacent notes has an identical frequency ratio. As pitch is perceived roughly as the logarithm of frequency, this means that the perceived "distance" from every note to its nearest neighbor is the same for...

    , chords played in different keys are qualitatively different.

Key coloration

Key coloration is the difference between the intervals
Interval (music)
In music theory, an interval is a combination of two notes, or the ratio between their frequencies. Two-note combinations are also called dyads...

 of different keys in a single non-equal tempered tuning, and the overall sound and "feel" the key created by the tuning of its intervals.

Historical irregular musical temperament
Musical temperament
In musical tuning, a temperament is a system of tuning which slightly compromises the pure intervals of just intonation in order to meet other requirements of the system. Most instruments in modern Western music are tuned in the equal temperament system...

s usually have the narrowest fifth
Perfect fifth
In classical music from Western culture, a fifth is a musical interval encompassing five staff positions , and the perfect fifth is a fifth spanning seven semitones, or in meantone, four diatonic semitones and three chromatic semitones...

s between the diatonic notes ("naturals") producing purer third
Major third
In classical music from Western culture, a third is a musical interval encompassing three staff positions , and the major third is one of two commonly occurring thirds. It is qualified as major because it is the largest of the two: the major third spans four semitones, the minor third three...

s, and wider fifths among the chromatic notes ("sharps and flats"). Each key then has a slightly different intonation
Intonation
Intonation may refer to:*Intonation , the variation of tone used when speaking*Intonation , a musician's realization of pitch accuracy, or the pitch accuracy of a musical instrument*Intonation Music Festival, held in Chicago...

, hence different key
Key (music)
In music theory, the term key is used in many different and sometimes contradictory ways. A common use is to speak of music as being "in" a specific key, such as in the key of C major or in the key of F-sharp. Sometimes the terms "major" or "minor" are appended, as in the key of A minor or in the...

s have distinct characters. Such "key coloration" was an essential part of much eighteenth- and nineteenth-century music and was described in treatises of the period.

For example, in tunings with a wolf-fifth, the key on the lowest note of the fifth will have a dramatically different sound than the other keys (and is often avoided). In Pythagorean tuning
Pythagorean tuning
Pythagorean tuning is a system of musical tuning in which the frequency relationships of all intervals are based on the ratio 3:2. This interval is chosen because it is one of the most consonant...

 on C (C, E+, G: 4, 5, 6), the major triad on C is just while the major triad on E+++ (F) is noticeably out of tune (E+++, A+, C: 4.125, 5, 6) due to E+++ (521.44 cents) being a Pythagorean comma
Pythagorean comma
In musical tuning, the Pythagorean comma , named after the ancient mathematician and philosopher Pythagoras, is the small interval existing in Pythagorean tuning between two enharmonically equivalent notes such as C and B , or D and C...

(23.46 cents) larger sharp compared to F.

Modern music lacks key coloration because it uses equal temperament
Equal temperament
An equal temperament is a musical temperament, or a system of tuning, in which every pair of adjacent notes has an identical frequency ratio. As pitch is perceived roughly as the logarithm of frequency, this means that the perceived "distance" from every note to its nearest neighbor is the same for...

 in which all keys have the same pattern of intonation, differing only in pitch.

Further reading

  • Innig, Renate (1970). System der Funktionsbezeichnung in den Harmonielehren seit Hugo Riemann. Düsseldorf: Gesellschaft zur Förderung der systematischen Musikwissenschaft.
  • Rahn, John (1980). Basic Atonal Theory. New York: Longman; London and Toronto: Prentice Hall International. ISBN 0-02-873160-3. Reprinted 1987, New York: Schirmer Books; London: Collier Macmillan.
  • Steblin, Rita (1983). A History of Key Characteristics in the 18th and Early 19th Centuries. UMI Research Press, Ann Arbor.

External links


Key coloration

  • http://www.rollingball.com/A01c.htm
  • http://campus.murraystate.edu/staff/scott.thile/research/unequal/index.htm
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