Power chord
Encyclopedia
In music
Music
Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...

, a power chord (also fifth chord) is a chord consisting of only the root note
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 chord and the fifth
Fifth (chord)
In music, the fifth factor of a chord is the note or pitch five scale degrees above the root or tonal center. When the fifth is the bass note, or lowest note, of the expressed chord, the chord is in second inversion ....

 interval
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...

, usually played on electric guitar
Electric guitar
An electric guitar is a guitar that uses the principle of direct electromagnetic induction to convert vibrations of its metal strings into electric audio signals. The signal generated by an electric guitar is too weak to drive a loudspeaker, so it is amplified before sending it to a loudspeaker...

, and typically through an amplification
Guitar amplifier
A guitar amplifier is an electronic amplifier designed to make the signal of an electric or acoustic guitar louder so that it will produce sound through a loudspeaker...

 process that imparts distortion. Power chords are a key element of many styles of rock music
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...

.

Analysis

When two or more notes are played through a distortion process which non-linearly
Nonlinearity
In mathematics, a nonlinear system is one that does not satisfy the superposition principle, or one whose output is not directly proportional to its input; a linear system fulfills these conditions. In other words, a nonlinear system is any problem where the variable to be solved for cannot be...

 transforms the audio signal, additional harmonics are generated at the sums and differences of the frequencies
Audio frequency
An audio frequency or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human...

 of the harmonics of those notes.

When a normal 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...

 (for example, a major
Major chord
In music theory, a major chord is a chord having a root, a major third, and a perfect fifth. When a chord has these three notes alone, it is called a major triad...

 or minor
Minor chord
In music theory, a minor chord is a chord having a root, a minor third, and a perfect fifth.When a chord has these three notes alone, it is called a minor triad....

 chord) consisting of three or more different degrees of the scale is played through distortion, the number of different frequencies generated, and the complex ratios between them, can cause the resulting sound to be messy and indistinct.

However, in a power chord, the ratio between the frequencies of the root and fifth is extremely close to 3:2 (see interval
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...

) . When played through distortion, this leads to the production of harmonics closely related in frequency to the original two notes, producing a more coherent sound. Additionally, the spectrum
Frequency spectrum
The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain. The frequency spectrum can be generated via a Fourier transform of the signal, and the resulting values are usually presented as amplitude and phase, both plotted versus frequency.Any signal...

 of the sound is expanded in both directions, producing a richer, more subjectively 'powerful' sound than the undistorted signal. With large amounts of distortion, the fundamental
Fundamental frequency
The fundamental frequency, often referred to simply as the fundamental and abbreviated f0, is defined as the lowest frequency of a periodic waveform. In terms of a superposition of sinusoids The fundamental frequency, often referred to simply as the fundamental and abbreviated f0, is defined as the...

 can appear to be an octave lower than the root note of the chord played without distortion, again giving a more bassy and powerful sound.

Even when played without distortion, the simple ratios between the harmonic
Harmonic
A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency, i.e. if the fundamental frequency is f, the harmonics have frequencies 2f, 3f, 4f, . . . etc. The harmonics have the property that they are all periodic at the fundamental...

s in the notes of a power chord can give a stark and powerful sound.

Power chords also have the added advantage of being relatively easy to play (see "Fingering" below), allowing fast chord changes and easy incorporation into melodies
Melody
A melody , also tune, voice, or line, is a linear succession of musical tones which is perceived as a single entity...

 and riff
RIFF
The Resource Interchange File Format is a generic file container format for storing data in tagged chunks. It is primarily used to store multimedia such as sound and video, though it may also be used to store any arbitrary data....

s.

Terminology

Theorists are divided on whether a power chord can be considered a chord in the traditional sense, with some requiring a 'chord' to contain a minimum of three degrees of the scale. When the same interval is found in traditional
Traditional music
Traditional music is the term increasingly used for folk music that is not contemporary folk music. More on this is at the terminology section of the World music article...

 and classical
Classical music
Classical music is the art music produced in, or rooted in, the traditions of Western liturgical and secular music, encompassing a broad period from roughly the 11th century to present times...

 music, it would not usually be called a "chord", and may be considered to be a dyad
Dyad (music)
In music, a dyad is a set of two notes or pitches. Although most chords have three or more notes, in certain contexts a dyad may be considered to be a chord. The most common two-note chord is made from the interval of a perfect fifth, which may be suggestive of music of the Medieval or Renaissance...

 or simply an interval
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...

. However, the term is accepted as a pop and rock music term, most strongly associated with the overdriven electric guitar styles of hard rock
Hard rock
Hard rock is a loosely defined genre of rock music which has its earliest roots in mid-1960s garage rock, blues rock and psychedelic rock...

, heavy metal
Heavy metal music
Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the Midlands of the United Kingdom and the United States...

, punk rock
Punk rock
Punk rock is a rock music genre that developed between 1974 and 1976 in the United States, the United Kingdom, and Australia. Rooted in garage rock and other forms of what is now known as protopunk music, punk rock bands eschewed perceived excesses of mainstream 1970s rock...

, and similar genres. The use of the term "power chord" has, to some extent, spilled over into the vocabulary of other instrumentalists, such as keyboard and synthesizer
Synthesizer
A synthesizer is an electronic instrument capable of producing sounds by generating electrical signals of different frequencies. These electrical signals are played through a loudspeaker or set of headphones...

 players.

Power chords are most commonly notated 5 or (no 3) . For example, "C5" or "C(no 3)" refer to playing the root (C) and fifth (G). These can be inverted
Inversion (music)
In music theory, the word inversion has several meanings. There are inverted chords, inverted melodies, inverted intervals, and inverted voices...

, so that the G is played below the C (making an interval of a fourth). They can also be played with octave doublings of the root or fifth note, which will make a sound that is subjectively higher pitched with less power in the low frequencies, but still retains the character of a power chord.

Another notation is ind, designating the chord as 'indeterminate' . This refers to the fact that a power chord is neither major nor minor, as there is no third present. This gives the power chord a chameleon
Chameleon
Chameleons are a distinctive and highly specialized clade of lizards. They are distinguished by their parrot-like zygodactylous feet, their separately mobile and stereoscopic eyes, their very long, highly modified, and rapidly extrudable tongues, their swaying gait, the possession by many of a...

-like property; if played where a major chord might be expected, it can sound like a major chord, but when played where a minor chord might be expected, it will sound minor.

Although the power chord is associated with a distorted sound, most guitarists would consider that a power chord fingering can be called a power chord whether played through distortion or not.

History

There is disagreement over which was the first record to feature power chords. Link Wray
Link Wray
Fred Lincoln "Link" Wray Jr was an American rock and roll guitarist, songwriter and occasional singer....

 is commonly cited as having introduced power chords with his 1958
1958 in music
-Events:*February - 45,000 peoplein one week watch performances of "rokabirī" music by Japanese singers at the first Nichigeki Western Carnival....

 instrumental
Instrumental
An instrumental is a musical composition or recording without lyrics or singing, although it might include some non-articulate vocal input; the music is primarily or exclusively produced by musical instruments....

 hit "Rumble". Wray used a pencil to punch holes into the loudspeaker of his amplifier in order to replicate a distortion effect first improvised at a show in Fredericksburg, Virginia
Fredericksburg, Virginia
Fredericksburg is an independent city in the Commonwealth of Virginia located south of Washington, D.C., and north of Richmond. As of the 2010 census, the city had a population of 24,286...

. Wray pioneered electric guitar distortions, like overdrive and fuzz, and was the first guitarist to use power chords to play a song's melody.

However, power chords can also be found in earlier, less commercially successful recordings. Robert Palmer has argued that blues guitarists Willie Johnson and Pat Hare
Pat Hare
Auburn "Pat" Hare was an American Memphis blues guitarist and singer.-Biography:He was born in Cherry Valley, Arkansas. He recorded at Sun Studios in Memphis, Tennessee, serving as a sideman for Howlin' Wolf, James Cotton, Muddy Waters, Bobby Bland and other artists...

, both of whom played for Sun Records
Sun Records
Sun Records is a record label founded in Memphis, Tennessee, starting operations on March 27, 1952.Founded by Sam Phillips, Sun Records was known for giving notable musicians such as Elvis Presley , Carl Perkins, Roy Orbison, and Johnny Cash...

 in the early 1950s, were the true originators of the power chord, citing as evidence Johnson's playing on Howlin' Wolf
Howlin' Wolf
Chester Arthur Burnett , known as Howlin' Wolf, was an influential American blues singer, guitarist and harmonica player....

's "How Many More Years" (recorded 1951) and Hare's playing on James Cotton
James Cotton
James Cotton is an American blues harmonica player, singer and songwriter, who has performed and recorded with many of the great blues artists of his time as well as with his own band.-Career:...

's "Cotton Crop Blues" (recorded 1954).

A later hit song
Hit single
A hit single is a recorded song or instrumental released as a single that has become very popular. Although it is sometimes used to describe any widely-played or big-selling song, the term "hit" is usually reserved for a single that has appeared in an official music chart through repeated radio...

 built around power chords was "You Really Got Me
You Really Got Me
"You Really Got Me" is a rock song written by Ray Davies and performed by his band, The Kinks. It was released on 4th August 1964 as the group's third single, and reached Number 1 on the UK singles chart the next month, remaining for two weeks...

" by the Kinks
The Kinks
The Kinks were an English rock band formed in Muswell Hill, North London, by brothers Ray and Dave Davies in 1964. Categorised in the United States as a British Invasion band, The Kinks are recognised as one of the most important and influential rock acts of the era. Their music was influenced by a...

, released in 1964
1964 in music
-Events:*January 1 – Top of the Pops is broadcast for the first time, on BBC television.*January 3 – Footage of the Beatles performing a concert in Bournemouth, England is shown on The Jack Paar Show....

. This song clearly demonstrates the fast power chord changes that would become typical of heavy rock riff
RIFF
The Resource Interchange File Format is a generic file container format for storing data in tagged chunks. It is primarily used to store multimedia such as sound and video, though it may also be used to store any arbitrary data....

s:

Early heavy rock bands such as Black Sabbath
Black Sabbath
Black Sabbath are an English heavy metal band, formed in Aston, Birmingham in 1969 by Ozzy Osbourne , Tony Iommi , Geezer Butler , and Bill Ward . The band has since experienced multiple line-up changes, with Tony Iommi the only constant presence in the band through the years. A total of 22...

, Led Zeppelin
Led Zeppelin
Led Zeppelin were an English rock band, active in the late 1960s and throughout the 1970s. Formed in 1968, they consisted of guitarist Jimmy Page, singer Robert Plant, bassist/keyboardist John Paul Jones, and drummer John Bonham...

 and Deep Purple
Deep Purple
Deep Purple are an English rock band formed in Hertford in 1968. Along with Led Zeppelin and Black Sabbath, they are considered to be among the pioneers of heavy metal and modern hard rock, although some band members believe that their music cannot be categorised as belonging to any one genre...

 also helped to popularize power chords. Examples include Deep Purple's "Smoke On The Water
Smoke on the Water
"Smoke on the Water" is a song by the British hard rock band Deep Purple. It was first released on their 1972 album Machine Head. In 2004, the song was ranked number 426 on Rolling Stone magazine's list of the 500 greatest songs of all time, and in March 2005, Q magazine placed "Smoke on the Water"...

" while examples from other genres in the 80s include the Cars
The Cars
The Cars are an American rock band that emerged from the early New Wave music scene in the late 1970s. The band consisted of lead singer and rhythm guitarist Ric Ocasek, lead singer and bassist Benjamin Orr, guitarist Elliot Easton, keyboardist Greg Hawkes and drummer David Robinson...

' "You Might Think
You Might Think
"You Might Think" is a single by The Cars from their fifth studio album, Heartbeat City, which came out in 1984. The track was written by Ric Ocasek, and produced by Mutt Lange and The Cars. Ocasek sang lead vocals....

". In these genres rather then being emphasized through distortion the "austerity" of a power chord may be emphasized, "by muting the strings and plucking the chord repeatedly."

Pete Townshend
Pete Townshend
Peter Dennis Blandford "Pete" Townshend is an English rock guitarist, vocalist, songwriter and author, known principally as the guitarist and songwriter for the rock group The Who, as well as for his own solo career...

, having been influenced by Link Wray
Link Wray
Fred Lincoln "Link" Wray Jr was an American rock and roll guitarist, songwriter and occasional singer....

, is often credited for introducing the term and the power chord in general and is an avid user of them. "My Generation
My Generation
My Generation is the debut album by the English rock band The Who, released by Brunswick Records in the United Kingdom in December 1965. In the United States it was released by Decca Records as The Who Sings My Generation in April 1966, with a different cover and a slightly altered track...

", live versions of "I Can't Explain
I Can't Explain
"I Can't Explain" is a song by the English rock band The Who, written by Pete Townshend, and produced by Shel Talmy. The song was issued as a single in December 1964 in the United States and on 15 January 1965 in the United Kingdom.-Background:...

", and "Baba O'Riley
Baba O'Riley
"Baba O'Riley" is a song written by Pete Townshend for the English rock band The Who. Roger Daltrey sings most of the song, with Pete Townshend singing the middle eight: "Don't cry/don't raise your eye/it's only teenaged wasteland"...

" are good examples of the sound produced.

Performance techniques

Power chords are often performed within a single octave, as this results in the closest matching of overtones. Octave doubling is sometimes done in power chords. Power chords are often pitched
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,...

 in a middle register. If they are too low, they tend to sound unclear and boomy. When played too high they lack depth and power.



Shown are four examples of an F5 chord. A common voicing is the 1-5 perfect fifth (A), to which the octave can be added, 1-5-1 (B). A perfect fourth 5-1 (C) is also a power chord, as it implies the "missing" lower 1 pitch. Either or both of the pitches may be doubled an octave above or below (D is 5-1-5-1), which leads to another common variation, 5-1-5 (not shown).

See also: Spider chord
Spider chord
The spider chord is a guitar technique popularized during the 80s thrash metal scene. Regarded as being re-popularized by Dave Mustaine of Megadeth, it is used to reduce string noise when playing riffs which require chords across several strings.The chord or technique is used in the songs "Wake Up...

.

Fingering

Perhaps the most common implementation is 1-5-1', that is, the root note, a note a fifth above the root, and a note an octave above the root. When the strings are a fourth apart, especially the lower four strings in standard tuning
Guitar tuning
Guitar tunings almost always refers to the pitch of the open string, though some tunings may only realistically be attained by the use of a capo on an unmodified instrument....

, the lowest note is played with some fret on some string and the higher two notes are two frets higher on the next two strings. Using standard tuning, notes on the first or second string need to be played one fret higher than this. (A bare fifth without octave doubling is the same, except that the highest of the three strings, in parentheses below, is not played. A bare fifth with the bass note on the second string has the same fingering
Fingering
In music, fingering is the choice of which fingers and hand positions to use when playing certain musical instruments. Fingering typically changes throughout a piece; the challenge of choosing good fingering for a piece is to make the hand movements as comfortable as possible without changing hand...

 as one on the fifth or sixth string.)

G5 A5 D5 E5 G5 A5 D5 A5
E||----------------------------------------------(10)---(5)----|
B||--------------------------------(8)----(10)----10-----5-----|
G||------------------(7)----(9)-----7------9------7------2-----|
D||----(5)----(7)-----7------9------5------7-------------------|
A||-----5------7------5------7---------------------------------|
E||-----3------5-----------------------------------------------|

An inverted bare fifth, i.e. a bare fourth, can be played with one finger, as in the example below, from the riff in Smoke on the Water
Smoke on the Water
"Smoke on the Water" is a song by the British hard rock band Deep Purple. It was first released on their 1972 album Machine Head. In 2004, the song was ranked number 426 on Rolling Stone magazine's list of the 500 greatest songs of all time, and in March 2005, Q magazine placed "Smoke on the Water"...

by Deep Purple
Deep Purple
Deep Purple are an English rock band formed in Hertford in 1968. Along with Led Zeppelin and Black Sabbath, they are considered to be among the pioneers of heavy metal and modern hard rock, although some band members believe that their music cannot be categorised as belonging to any one genre...

:

G5/D Bb5/F C5/G G5/D Bb5/F Db5/Ab C5/G
E||------------------------|----------------------|
B||------------------------|----------------------|
G||*------3---5------------|-------3---6---5------|
D||*--5---3---5------------|---5---3---6---5------|
A||---5--------------------|---5------------------|
E||------------------------|----------------------|

|-----------------------|---------------------||
|-----------------------|---------------------||
|------3---5---3---0----|--------------------*||
|---5--3---5---3---0----|--------------------*||
|---5-------------------|---------------------||
|-----------------------|---------------------||

Another implementation used is 5-1'-5', that is, a note a fourth below the root, the root note, and a note a fifth above the root. (This is sometimes called a "fourth chord", but usually the second note is taken as the root, although it's not the lowest one.) When the strings are a fourth apart, the lower two notes are played with some fret on some two strings and the highest note is two frets higher on the next string. Of course, using standard tuning, notes on the first or second string need to be played one fret higher.

D5 E5 G5 A5 D5 A5 D5 G5
E||-----------------------------------------------5------10----|
B||---------------------------------10-----5------3------8-----|
G||-------------------7------9------7------2-----(2)----(7)----|
D||-----7------9------5------7-----(7)----(2)------------------|
A||-----5------7-----(5)----(7)--------------------------------|
E||----(5)----(7)----------------------------------------------|

With the drop D tuning
Drop D tuning
Drop D tuning, also known as DADGBE, is an alternate, or scordatura, form of guitar tuning — specifically, a dropped tuning — in which the lowest string is tuned down from the usual E of standard tuning by one whole step to D.- Uses of drop D tuning :In drop D the three bass strings...

--or any other dropped tuning for that matter--power chords with the bass on the sixth string can be played with one finger, and D power chords can be played on three open strings.

In order to maintain the alternating dominant and recessive notes, they almost never consist of more than 3 strings.
D5 E5
E||----------------
B||----------------
G||----------------
D||--0-------2-----
A||--0-------2-----
D||--0-------2-----

Occasionally, open, "stacked" power chords with more than three notes are used in drop D
Drop D tuning
Drop D tuning, also known as DADGBE, is an alternate, or scordatura, form of guitar tuning — specifically, a dropped tuning — in which the lowest string is tuned down from the usual E of standard tuning by one whole step to D.- Uses of drop D tuning :In drop D the three bass strings...

.

E||--------------------------5---
B||--3-------5-------7-------3---
G||--2-------4-------6-------2---
D||--0-------2-------4-------0---
A||--0-------2-------4-------0---
D||--0-------2-------4-------0---

Further reading


External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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