Editing Chord progression (section)

===Simple progressions===
[[Diatonic]] scales such as the [[major and minor]] scales lend themselves particularly well to the construction of common chords because they contain many [[perfect fifth]]s. Such scales predominate in those regions where harmony is an essential part of music, as, for example, in the [[common practice period]] of western classical music. In considering [[Arabic music|Arab]] and [[Music of India|Indian]] music, where diatonic scales are used, there are also available a number of non-diatonic scales, the music has no chord changes, remaining always upon the key-chord, an attribute which has also been observed in [[hard rock]], [[hip hop]],<ref>{{cite journal|jstor=10.1525/mp.2002.19.3.285|title=Black Atlantic Rhythm: Its Computational and Transcultural Foundations|author=Jeff Pressing|journal=Music Perception|volume=19|date=2002|issue=3|pages=285–310|publisher=[[University of California Press]]|doi=10.1525/mp.2002.19.3.285}}</ref> [[funk]], [[disco]],<ref>{{cite web|url=http://www.yosemiteuhsd.com/finearts/rock/15_funk_disco.pdf |title=Chapter 15---Funk and Disco |access-date=6 May 2011 |url-status=dead |archive-url=https://web.archive.org/web/20110719204120/http://www.yosemiteuhsd.com/finearts/rock/15_funk_disco.pdf |archive-date=19 July 2011 }}</ref> [[jazz]], etc.

Alternation between two chords may be thought of as the most basic chord progression. Many well-known pieces are built harmonically upon the mere repetition of two chords of the same scale.<ref name="Schoenberg" /> For example, many of the more straightforward melodies in classical music consist entirely or mostly of alternation between the tonic (I) and the dominant (V, sometimes with an [[Dominant seventh chord|added seventh]]), as do popular songs such as "[[Achy Breaky Heart]]".<ref>{{Cite web|url=https://www.musicnotes.com/sheetmusic/mtd.asp?ppn=MN0042636|title=Achy Breaky Heart|last1=Von|first1=Tress, Don|last2=Ray|first2=Cyrus, Billy|date=26 August 2002|website=Musicnotes.com|access-date=1 August 2019}}</ref> [[The Isley Brothers]]' "[[Shout (Isley Brothers song)|Shout]]" uses I–vi throughout.<ref>{{cite web|url=http://www.musicnotes.com/sheetmusic/mtdVPE.asp?ppn=MN0063604 |title=The Isley Brothers "Shout" Sheet Music in F Major (transposable)|website=Musicnotes.com |date=23 August 2010 |access-date=17 July 2016}}</ref>