meantone temperament

music
      system of tuning keyboard instruments (keyboard instrument), prevalent from c. 1500 through the 18th century. It enabled keyboard instruments to play in five or six closely related keys, rather than in only one key. The system supposedly used in medieval monophonic (melody-only) music, just intonation, derived the proper tuning of all the intervals in the scale by various additions and subtractions of perfect natural fifths and thirds (in tune with the fifths and thirds found in the natural harmonic series, perceivable as faint overtones above a fundamental note). This process resulted in whole tones of two sizes. When an instrument tuned, say, in C was played in G, the large and small whole tones were in the wrong order, and the instrument sounded sourly out of tune. Meantone tuning substituted a single, mean whole tone, hence its name.

      Meantone tuning accomplished this by making the fifth slightly smaller than a natural fifth (by 16 cents; 1 cent = 1/1200 octave). When a series of four meantone fifths was tuned (C–G; G–d; d–a; a–e′) and the excess octaves (here, between C and e′) were removed, the result was a pure, or natural, major third (c–e′). Various combinations of meantone fifths were used to determine the correct tuning of each of the keyboard's 12 notes per octave. The result was a notably pleasing sonority for triads (the predominant chord type, consisting of a root, a third, and a fifth, as c–e–g).

      In the tuning of the black keys, however, notes such as F♯ and G♭, which share the same key, did not have the same pitch. A given black key could thus serve only for one of its two possible notes, the usual choices being C♯, E♭, F♯, G♯, and B♭. If an instrument was played in a key requiring an alternative note, say A♭ instead of G♯, a strong dissonance, known as the “wolf,” resulted. This disadvantage led, in the 18th century, to the replacement of meantone tuning by equal temperament (q.v.); it persisted in England, however, into the mid-19th century, and it has been revived in the 20th for specialized use.

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Universalium. 2010.

Look at other dictionaries:

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  • Temperament Ordinaire — The phrase temperament ordinaire , (French tempérament ordinaire , meaning literally: ordinary temperament or usual temperament ), relates to musical intonation, and especially to the tempered tuning of keyboard instruments. At least in its later …   Wikipedia

  • meantone system — ˈ ̷ ̷ˌ ̷ ̷ noun : a system of tuning keyboard instruments used before the adoption of equal temperament and based on a standard interval of a mean between a major and a minor whole tone of just intonation or one half of an acoustically pure major …   Useful english dictionary

  • meantone system — /meen tohn /, Music. a system for tuning keyboard instruments, used before the development of tuning by equal temperament and considered practical only for tonalities of not more than two sharps or flats. [1790 1800; MEAN3 + TONE] * * * …   Universalium

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  • Equal temperament — is a musical temperament, or a system of tuning in which every pair of adjacent notes has an identical frequency ratio. In equal temperament tunings an interval mdash; usually the octave mdash; is divided into a series of equal steps (equal… …   Wikipedia

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  • Well temperament — (also circular or circulating temperament) is a type of tempered tuning described in 20th century music theory. The term is modelled on the German word wohltemperiert which appears in the title of J.S. Bach s famous composition, The Well Tempered …   Wikipedia

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