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  2. Quarter tone - Wikipedia

    en.wikipedia.org/wiki/Quarter_tone

    Quarter tone on C. A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (orally, or logarithmically) as a semitone, which itself is half a whole tone. Quarter tones divide the octave by 50 cents each, and have 24 different pitches.

  3. List of pitch intervals - Wikipedia

    en.wikipedia.org/wiki/List_of_pitch_intervals

    Comparison between tunings: Pythagorean, equal-tempered, quarter-comma meantone, and others.For each, the common origin is arbitrarily chosen as C. The degrees are arranged in the order or the cycle of fifths; as in each of these tunings except just intonation all fifths are of the same size, the tunings appear as straight lines, the slope indicating the relative tempering with respect to ...

  4. Category:Quarter tones - Wikipedia

    en.wikipedia.org/wiki/Category:Quarter_tones

    Pages in category "Quarter tones" The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes. ...

  5. Musical system of ancient Greece - Wikipedia

    en.wikipedia.org/wiki/Musical_system_of_ancient...

    The diatonic genus is composed of tones and semitones, the chromatic genus is composed of semitones and a minor third, the enharmonic genus consists of a major third and two quarter-tones or diesis. [16] Within these basic forms, the intervals of the chromatic and diatonic genera were varied further by three and two "shades" (chroai ...

  6. Microtonality - Wikipedia

    en.wikipedia.org/wiki/Microtonality

    Microtonality is the use in music of microtones — intervals smaller than a semitone, also called "microintervals".It may also be extended to include any music using intervals not found in the customary Western tuning of twelve equal intervals per octave.

  7. List of quarter tone pieces - Wikipedia

    en.wikipedia.org/wiki/List_of_quarter_tone_pieces

    Dialogue, for two pianos tuned a quarter-tone apart, eight hands, W.o.O. (1959) Dithyrambe, for two pianos tuned a quarter-tone apart, Op. 12 (1923–1924) Études sur les mouvements rotatoires, for two pianos tuned a quarter-tone apart, eight hands, Op. 45a.; for chamber orchestra, Op. 45c (1961)

  8. Enharmonic scale - Wikipedia

    en.wikipedia.org/wiki/Enharmonic_scale

    Four of the scale notes – the tonic (C in the example), subdominant (F), dominant (G), and octave (C′) – are all fixed: They are nearly exactly the same relative pitches in all three categories of ancient Greek scales (enharmonic, chromatic, and diatonic), [4] and in ancient Greek music, the fixed tones relative pitches were very nearly the same as the corresponding notes in the modern ...

  9. Arab tone system - Wikipedia

    en.wikipedia.org/wiki/Arab_tone_system

    The modern Arab tone system, or system of musical tuning, is based upon the theoretical division of the octave into twenty-four equal divisions or 24-tone equal temperament, the distance between each successive note being a quarter tone (50 cents). Each tone has its own name not repeated in different octaves, unlike systems featuring octave ...