Subminor and supermajor
In music, a subminor interval is an interval that is noticeably wider than a diminished interval but noticeably narrower than a minor interval. It is found in between a minor and diminished interval, thus making it below, or subminor to, the minor interval. A supermajor interval is a musical interval that is noticeably wider than a major interval but noticeably narrower than an augmented interval. It is found in between a major and augmented interval, thus making it above, or supermajor to, the major interval. The inversion of a supermajor interval is a subminor interval, and there are four major and four minor intervals, allowing for eight supermajor and subminor intervals, each with variants.
| diminished | subminor | minor | neutral | major | supermajor | augmented | |
|---|---|---|---|---|---|---|---|
| seconds | Ddouble flat | ≊ Dthree quarter flat | D♭ | Dhalf flat | D | ≊ Dhalf sharp | D♯ |
| thirds | Edouble flat | ≊ Ethree quarter flat | E♭ | Ehalf flat | E | ≊ Ehalf sharp | E♯ |
| sixths | Adouble flat | ≊ Athree quarter flat | A♭ | Ahalf flat | A | ≊ Ahalf sharp | A♯ |
| sevenths | Bdouble flat | ≊ Bthree quarter flat | B♭ | Bhalf flat | B | ≊ Bhalf sharp | B♯ |
Traditionally, "supermajor and superminor, [are] the names given to certain thirds [9:7 and 17:14] found in the justly intoned scale with a natural or subminor seventh."[2]
Subminor second and supermajor seventh
Thus, a subminor second is intermediate between a minor second and a diminished second (enharmonic to unison). An example of such an interval is the ratio 26:25, or 67.90 cents (D13double flat- ). Another example is the ratio 28:27, or 62.96 cents (C7♯- ). A supermajor seventh is an interval intermediate between a major seventh and an augmented seventh. It is the inverse of a subminor second. Examples of such an interval is the ratio 25:13, or 1132.10 cents (B13 upside down♯); the ratio 27:14, or 1137.04 cents (B7 upside-down ); and 35:18, or 1151.23 cents (C7 ).
Subminor third and supermajor sixth
A subminor third is in between a minor third and a diminished third. An example of such an interval is the ratio 7:6 (E7♭), or 266.87 cents,[3][4] the septimal minor third, the inverse of the supermajor sixth. Another example is the ratio 13:11, or 289.21 cents (E13↓♭). A supermajor sixth is noticeably wider than a major sixth but noticeably narrower than an augmented sixth, and may be a just interval of 12:7 (A7 upside-down).[5][6][7] In 24 equal temperament Ahalf sharp = Bthree quarter flat. The septimal major sixth is an interval of 12:7 ratio (A7 upside-down ),[8][9] or about 933 cents.[10] It is the inversion of the 7:6 subminor third.
Subminor sixth and supermajor third
A subminor sixth or septimal sixth is noticeably narrower than a minor sixth but noticeably wider than a diminished sixth, enharmonically equivalent to the major fifth. The sub-minor sixth is an interval of a 14:9 ratio[6][7] (A7♭) or alternately 11:7.[5] (G↑- ) The 21st subharmonic (see subharmonic) is 729.22 cents.
A supermajor third is in between a major third and an augmented third, enharmonically equivalent to the minor fourth. An example of such an interval is the ratio 9:7, or 435.08 cents, the septimal major third (E7 upside-down). Another example is the ratio 50:39, or 430.14 cents (E13 upside down♯).
Subminor seventh and supermajor second
A subminor seventh is an interval between a minor seventh and a diminished seventh. An example of such an interval is the 7:4 ratio, the harmonic seventh (B7♭). A supermajor second (or supersecond[2]) is intermediate to a major second and an augmented second. An example of such an interval is the ratio 8:7, or 231.17 cents,[1] also known as the septimal whole tone (D7 upside-down- ) and the inverse of the subminor seventh. Another example is the ratio 15:13, or 247.74 cents (D13 upside down♯).
Use
Composer Lou Harrison was fascinated with the 7:6 subminor third and 8:7 supermajor second, using them in pieces such as Concerto for Piano with Javanese Gamelan, Cinna for tack-piano, and Strict Songs (for voices and orchestra).[12] Together the two produce the 4:3 just perfect fourth.[13] 19 equal temperament has several intervals which are simultaneously subminor, supermajor, augmented, and diminished, due to tempering and enharmonic equivalence (both of which work differently in 19-ET than standard tuning). For example, four steps of 19-ET (an interval of roughly 253 cents) is all of the following: subminor third, supermajor second, augmented second, and diminished third.
See also
References
- ↑ 1.0 1.1 Miller, Leta E., ed. (1988). Lou Harrison: Selected keyboard and chamber music, 1937-1994. p. XLIII. ISBN 978-0-89579-414-7..
- ↑ 2.0 2.1 Brabner, John H. F. (1884). The National Encyclopaedia, vol. 13, p. 182. London. [ISBN unspecified]
- ↑ Helmholtz, Hermann L. F. von (2007). On the Sensations of Tone. pp. 195, 212. ISBN 978-1-60206-639-7.
- ↑ Miller 1988, p. XLII.
- ↑ 5.0 5.1 Andrew Horner, Lydia Ayres (2002). Cooking with Csound: Woodwind and Brass Recipes, p. 131. ISBN 0-89579-507-8.
- ↑ 6.0 6.1 Royal Society (Great Britain) (1880, digitized February 26, 2008). Proceedings of the Royal Society of London, vol. 30, p. 531. Harvard University.
- ↑ 7.0 7.1 Society of Arts (Great Britain) (1877, digitized November 19, 2009). Journal of the Society of Arts, vol. 25, p. 670.
- ↑ Partch, Harry (1979). Genesis of a Music, p. 68. ISBN 0-306-80106-X.
- ↑ Haluska, Jan (2003). The Mathematical Theory of Tone Systems, p. xxiii. ISBN 0-8247-4714-3.
- ↑ Helmholtz 2007, p. 456.
- ↑ John Fonville. "Ben Johnston's Extended Just Intonation- A Guide for Interpreters", p. 122, Perspectives of New Music, vol. 29, no. 2 (Summer 1991), pp. 106–137.
- ↑ Miller and Lieberman (2006), p. 72.[incomplete short citation]
- ↑ Miller & Lieberman (2006), p. 74. "The subminor third and supermajor second combine to create a pure fourth (8⁄7 x 7⁄6 = 4⁄3)."[incomplete short citation]
