# 增四度

转位 減五度 三全音（Tritone） A4（TT） 6 6 25:18, 45:32, 10:7 等 600 600 569, 590, 617 等

## 構成條件

1. 組成音程的兩個音，其音名之間的距離為4，即C必須配F#、D-G#、Eb-A、F-B、G-C#、A-D#、Bb-E
2. 半音數目為6個

• ［C-F］、［C-F
• ［D-G］、［D-G
• ［E-A］、［E-A
• ［F-B］、［F-B］、［F-B
• ［G-C］、［G-C
• ［A-D］、［A-D
• ［B-E］、［B-E

（註：所有涉及  的皆不在此收錄。）

C D E F
（音距） 全音 全音 全音

F G A B C
（音距） 半音 全音 全音 半音

## 基本介紹

( 聆聽) 完全四度 (a), 增四度 (b) 和減四度 (c)

## 參考資料

1. Haluska, Ján (2003). The Mathematical Theory of Tone Systems, Pure and Applied Mathematics Series 262 (New York: Marcel Dekker; London: Momenta), p. xxiii. ISBN 0824747143. "7/5 septimal or Huygens' tritone, Bohlen-Pierce fourth", "10/7 Euler's tritone".
2. ^ Haluska (2003), p. xxiv. "25:18 classic augmented fourth".
3. Partch, Harry. (1974). Genesis Of A Music: An Account of a Creative Work, Its Roots and Its Fulfillments, second edition, enlarged (New York: Da Capo Press): p. 69. ISBN 030671597X (cloth); ISBN 030680106X (pbk).
4. ^ Renold, Maria (2004). Intervals, Scales, Tones and the Concert Pitch C=128Hz, translated from the German by Bevis Stevens, with additional editing by Anna R. Meuss (Forest Row: Temple Lodge): p. 15–16. ISBN 1902636465.
5. ^ Haluska (2003), p. xxv. "36/25 classic diminished fifth".
6. ^ Helmholtz, Hermann von (2005). On the Sensations of Tone as a Physiological Basis for the Theory of Music, p. 457. ISBN 1419178938. "Cents in interval: 590, Name of Interval: Just Tritone, Number to an Octave: 2.0. [Cents:] 612, [Name:] Pyth.[agorean] Tritone, [per octave:] 2.0."
7. ^ Strange, Patricia and Patricia, Allen (2001). The contemporary violin: Extended performance techniques, p. 147. ISBN 0520224094. "...septimal tritone, 10:7; smaller septimal tritone, 7:5;...This list is not exhaustive, even when limited to the first sixteen partials. Consider the very narrow augmented fourth, 13:9....just intonation is not an attempt to generate necessarily consonant intervals."
8. ^ Drabkin, William. Tritone. Grove Music Online (subscription access). Oxford Music Online. [2008-07-21].
9. ^ Arnold, Denis (1983) « Tritone » in The New Oxford Companion to Music, Volume 1: A-J,Oxford University Press. ISBN 0-19-311316-3

## 延伸閱讀

• R., Ken (2012). DOG EAR Tritone Substitution for Jazz Guitar, Amazon Digital Services, Inc., ASIN: B008FRWNIW