World Library  
Flag as Inappropriate
Email this Article

Musical temperament

Article Id: WHEBN0006175255
Reproduction Date:

Title: Musical temperament  
Author: World Heritage Encyclopedia
Language: English
Subject: Meantone temperament, Dynamic tonality, Equal temperament, Musical tuning, Temperament ordinaire
Publisher: World Heritage Encyclopedia

Musical temperament

Comparison of notes derived from, or near, twelve perfect fifths (B).

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. "Tempering is the process of altering the size of an interval by making it narrower or wider than pure. A temperament is any plan that describes the adjustments to the sizes of some or all of the twelve fifth intervals in the circle of fifths so that they accommodate pure octaves and produce certain sizes of major thirds."[1] Temperament is especially important for keyboard instruments, which typically allow a player to play only the pitches assigned to the various keys, and lack any way to alter pitch of a note in performance. Historically, the use of just intonation, Pythagorean tuning and meantone temperament meant that such instruments could sound "in tune" in one key, or some keys, but would then have more dissonance in other keys.

The development of well temperament allowed fixed-pitch instruments to play reasonably well in all of the keys. The famous "Well-Tempered Clavier" by Johann Sebastian Bach takes full advantage of this breakthrough, with pieces written in all 24 major and minor keys. However, while unpleasant intervals (such as the wolf interval) were avoided, the sizes of intervals were still not consistent between keys, and so each key still had its own character. This variation led in the 18th century to an increase in the use of equal temperament, in which the frequency ratio between each pair of adjacent notes on the keyboard was made equal, allowing music to be transposed between keys without changing the relationship between notes.

What temperament is

Temperament, in music, the accommodation or adjustment of the imperfect sounds by transferring a part of their defects to the more perfect ones, in order to remedy, in some degree, the false intervals of those instruments, the sounds of which are fixed; as the organ, harpsichord, piano-forte, etc.
Temperament is what the Italians call participatione, or system temperato, because it is founded on temperature; that is, on the diminution of some intervals and augmentation of others, by which it partakes of the diatonic and chroniatic systems.[2]

"Temperament refers to the various tuning systems for the subdivision of the octave," the four principal tuning systems being Pythagorean tuning, just intonation, mean-tone temperament, and equal temperament.[3] In just intonation, every interval between two pitches corresponds to a whole number ratio between their frequencies, allowing intervals varying from the highest consonance to highly dissonant. For instance, 660 Hz / 440 Hz (a ratio of 3:2) constitutes a fifth, and 880 Hz / 440 Hz (2:1) an octave. Such intervals (termed "just") have a stability, or purity to their sound, when played simultaneously (assuming they are played using timbres with harmonic partials). If one of those pitches is adjusted slightly to deviate from the just interval, a trained ear can detect this change by the presence of beats, which are periodical oscillations in the note's intensity. If, for example, two sound signals with frequencies that vary just by 0.5 Hz are played simultaneously, both signals will be out of phase by a very small margin, creating the periodical oscillations in the intensity of the final sound (caused by the superposition of both signals) with a repetition period of 2 seconds (following the equation Tr=1/Δf, Tr being the period of repetition and Δf being the difference in frequencies between both signals), because the amplitude of the signals will only be in phase, and therefore have a maximum superposition value, once every period of repetition.

Acoustic physics

When a musical instrument with harmonic overtones is played, the ear hears a composite waveform that includes a fundamental frequency (e.g., 440 Hz) and those overtones (880 Hz, 1760 Hz, etc.) – a series of just intervals. The waveform of such a tone (as pictured on an oscilloscope) is characterized by a shape that is complex compared to a simple (sine) waveform, but which remains periodic. When two tones depart from exact integer ratios, the shape waveform becomes erratic – a phenomenon which may be described as destabilization. As the composite waveform becomes more erratic, the consonance of the interval also changes.

Temperament in music

Tempering an interval involves the deliberate use of such minor adjustments (accepting the related destabilization) to enable musical possibilities that are impractical using just intonation. The most widely known example of this is the use of equal temperament to address problems of older temperaments, allowing for consistent tuning of keyboard and fretted instruments and enabling musical composition in, and modulation among, the various keys.

Meantone temperament

Before Meantone temperament became widely used in the Renaissance, the most commonly used tuning system was Pythagorean tuning. Pythagorean tuning was a system of just intonation which tuned every note in a scale from a progression of pure perfect fifths. This was quite suitable for much of the harmonic practice until then (See: Quartal harmony), but in the Renaissance, musicians wished to make much more use of Tertian harmony. The major third of Pythagorean tuning differed from a just major third by an amount known as Syntonic comma, which musicians of the time found annoying.

Their solution, laid out by Pietro Aron in the early 16th century, and referred to as meantone temperament (or quarter-comma meantone temperament), was to temper the interval of a perfect fifth slightly narrower than in just intonation, and then proceed much like Pythagorean tuning, but using this tempered fifth instead of the just one. With the correct amount of tempering, the Syntonic comma is removed from its major thirds, making them just. This compromise, however, leaves all fifths in this tuning system with a slight beating. However, because a sequence of four fifths makes up one third, this beating effect on the fifths is only one quarter as strong as the beating effect on the thirds of Pythagorean tuning, which is why it was considered a very acceptable compromise by Renaissance musicians.

Pythagorean tuning also had a second problem, which Meantone temperament does not solve, which is the problem of modulation (see below), which is restricted because both have a broken circle of fifths. A series of 12 just fifths as in Pythagorean tuning does not return to the original pitch, but rather differs by a Pythagorean comma, which makes that tonal area of the system more or less unusable. In meantone temperament, this effect is even more pronounced (the fifth over the break in the circle is known as the Wolf interval, as its intense beating was likened to a "howling".) The use of 53 equal temperament provides a solution for the Pythagorean tuning, and 31 equal temperament for the Meantone.

Well temperament and equal temperament

Just intonation has the problem that it cannot modulate to a different key (a very common means of expression throughout the common practice period of music) without discarding many of the tones used in the previous key, thus for every key to which the musician wishes to modulate, the instrument must provide a few more strings, frets, or holes for him or her to use. When building an instrument, this can be very impractical.

Well temperament is the name given to a variety of different systems of temperament that were employed to solve this problem, in which some keys are more in tune than others, but all can be used. This phenomenon gives rise to infinite shades of key-colors, which are lost in the modern standard version: 12 tone equal temperament (12-TET). Unlike meantone temperament, which alters the fifth to "temper out" the Syntonic comma, 12-TET tempers out the Pythagorean comma, thus creating a cycle of fifths that repeats itself exactly after 12 steps. This allowed the intervals of tertian harmony, thirds and fifths, to be fairly close to their just counterparts (the fifths almost imperceptibly beating, the thirds a little milder than the syntonic beating of Pythagorean tuning), while permitting the freedom to modulate to any key and by various means (e.g. common-tone and enharmonic modulation, see modulation). This freedom of modulation also allowed substantial use of more distant harmonic relationships, such as the Neapolitan chord, which became very important to Romantic composers in the 19th century.

Frequently used equal temperament scales

See also


  1. ^ Donahue, Thomas (2005). A Guide to Musical Temperament, p.19. Scarecrow. ISBN 9780810854383.
  2. ^ John Mason Good, Olinthus Gregory, Newton Bosworth (1813). Pantologia: New Cyclopedia, . Kearsley. .
  3. ^ Cooper, Paul (1975). Perspectives in Music Theory, p.16. Dodd, Mead & Co. ISBN 0-396-06752-2.

Further reading

  • Barbour, J. Murray. Tuning and Temperament : A Historical Survey. East Lansing: Michigan State College Press, 1953.
  • Jorgensen, Owen. Tuning: Containing the Perfection of Eighteenth-Century Temperament; The Lost Art of Nineteenth Century Temperament; and The Science of Equal Temperament. Michigan State University Press, 1991. ISBN 0-87013-290-3
  • Miller, Willis G. The Effects of Non-Equal Temperament on Chopin's Mazurkas. PhD diss., University of Houston, October 2001.
  • Pressler, James. The Temperamental Mr. Purcell. Frog Music Press, UPC 883629638829
  • Steblin, Rita. A History of Key Characteristics in the 18th and Early 19th Centuries. UMI Research Press, Ann Arbor, 1983.

External links


  • , by Jan Swafford, 2010-04-20The Wolf at Our Heels: The centuries-old struggle to play in tune
  • Willem Kroesbergen, Andrew Cruickshank: "18th century quotes on J.S. Bach's temperament"
  • Dominic Eckersley: "Rosetta Revisited: Bach's Very Ordinary Temperament". Academia website.


  • Music: a Mathematical Offering (mathematical perspective with two chapters on temperament) by Dave Benson
  • Tuning And Temperament A Historical Survey (1951) by J. Murray Barbour
  • Essay on Musical Temperament (part 2) by Prof. Fisher (Yale College)
  • (1753)A supplement to Mr. Chambers's cyclopædia"Temperament" from
  • (1850)Theory and practice of just intonation by Thomas Perronet Thompson
  • Elements of musical composition: comprehending the rules of thorough bass and the theory of tuning (1812) by William Crotch
  • An essay on temperament (1832) by J. Jousse
  • Essay on musical intervals, harmonics, and the temperament of the musical scale, &c (1835) by Wesley Stoker B. Woolhouse
  • Harmonics, or The philosophy of musical sounds (1759) by Robert Smith (1689–1768)
  • Modern organ tuning : the how and why? by Hermann Smith (1824–1910)
  • Piano Tuning: A Simple and Accurate Method for Amateurs by Jerry Cree Fischer
  • The organ viewed from within : a practical handbook on the mechanism of the organ, with a chapter on tuning by John Broadhouse
  • Construction, Tuning and Care of the Piano-forte (1887) by Edward Quincy Norton
  • Regulation and Repair of Piano and Player Mechanism, Together with Tuning as Science and Art (1909) by William Braid White
  • Modern piano tuning and allied arts (1917) by William Braid White (1878–1959)
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.