augmented triad

{{Short description|Musical chord}}

{{redirect|Augmented dominant chord|seventh chord|Augmented dominant seventh chord}}

{{redirect|Faug|the video game|Fearless and United Guards}}

{{Infobox chord|

chord_name=augmented triad|

first_interval=root|

second_interval=major third|

third_interval=augmented fifth|

tuning=16:20:25|

forte_number=3-12|

complement=9-12

}}

An augmented triad is a chord, made up of two major thirds (an augmented fifth). The term augmented triad arises from an augmented triad being considered a major chord whose top note (fifth) is raised. When using popular-music symbols, it is indicated by the symbol "+" or "aug". For example, the augmented triad built on A{{music|flat}}, written as A{{music|flat}}+, has pitches A{{music|flat}}-C-E:

{ \omit Score.TimeSignature \relative c' { 1 } }

The chord can be represented by the integer notation {0, 4, 8}.

Analysis

Whereas a major triad, such as C–E–G, contains a major third (C–E) and a minor third (E–G), with the interval of the fifth (C–G) being perfect, the augmented triad has an augmented fifth, becoming C–E–G{{music|sharp}}. In other words, the top note is raised a semitone. H.R. Palmer notes:

{{blockquote|The augmented chord, (which appears upon three of the minor key,) is commonly found upon one, four, or five of a major key. In its resolution the fundamental may either remain stationary, descend five degrees, or ascend four degrees; the third may either ascend a minor second [I+, IV ({{audio|Augmented chord progression I+ IV Palmer.mid|Play}}) and I+, IV{{su|p=6|b=4}} ({{audio|Augmented chord progression I+ IV64 Palmer.mid|Play}})], or remain stationary [I+, vi{{su|p=6|b=3}} ({{audio|Augmented chord progression I+ vi63 Palmer.mid|Play}})]; and the fifth ascends a minor second. The inversions of the augmented chord may also be used [I+{{sup|{{music|sharp}}6}}, IV ({{audio|Augmented chord progression I+sharp6 IV Palmer.mid|Play}}) and I+{{su|p=6|b=4}}, IV{{sup|6}} ({{audio|Augmented chord progression I+64 IV6 Palmer.mid|Play}})].{{cite book|last=Palmer|first=H. R.|date=1876|url=https://archive.org/details/palmerstheoryofm00palm|quote=augmented chord.|title=Palmer's Theory of Music|pages=[https://archive.org/details/palmerstheoryofm00palm/page/91 91]–92|publisher=J. Church}}{{pre-ISBN}}|sign=|source=}}

The augmented chord on I may contain the major seventh (I{{su|p=7|b=5}} ({{audio|Augmented chord progression I+75 IV Palmer.mid|Play}}) or I{{su|p=6|b=5}} ({{audio|Augmented chord progression I+65 IV Palmer.mid|Play}})), while the augmented chord on V may contain the minor seventh (V{{su|p=7|b=5}} ({{audio|Augmented chord progression V+75 I Palmer.mid|Play}}), V{{su|p=6|b=5}} ({{audio|Augmented chord progression V+65 I Palmer.mid|Play}}), or V{{su|p=4|b=3}} ({{audio|Augmented chord progression V+43 I63 Palmer.mid|Play}})). In C: C–E–G{{music|#}}–B and G–B–D{{music|#}}–F.

The augmented triad on the V may be used as a substitute dominant, and may also be considered as {{music|b}}III+.{{cite book|last=Cho|first=Gene|date=1992|title=Theories and Practice of Harmonic Analysis|page=35|isbn=0-7734-9917-2}} The example below shows {{music|b}}III+ as a substitute dominant in a ii-V-I turnaround in C major.

{

\omit Score.TimeSignature

\relative c' {2 1 \bar "||" } }

See, for example, Henry Purcell's Dido & Aeneas.File:Purcell from Dido & Aeneas, Act 2, scene 1, echo chorus 01.wavFile:Purcell from Dido & Aeneas, Act 2, scene 1, echo chorus.png

In classical music

The augmented triad differs from the other kinds of triad (the major triad, the minor triad, and the diminished triad) in that it does not naturally arise in a diatonic scale. Although it could be conceptualized as a triad built on the third degree of a harmonic minor scale or melodic minor scale, it virtually never occurs in this way due to the harsh dissonance of the chord.

Striking examples of its use may be found in Mozart’s keyboard minuet K355. It first occurs as a passing chord on the third beat of bar 1 (D{{music|sharp}}–G–B). However it comes into more striking prominence in the 6-bar sequential passage starting on the first beat of bar 5 (D-F{{music|sharp}}–A{{music|sharp}}):

File:Mozart, Minuet, K355.wavFile:Mozart, Minuet, K355.png

According to Aubyn Raymar, in this minuet “flowing counterpoints woven among closely crowded chromaticisms and richly variegated harmony, sequential progressions in either direction coupled with unexpected dissonance… - such resources used with a mastery of concentration intensify the emotion which stirs within the brooding phrases of a perfectly balanced poem.” Raymar, A. (1931, p.3) introduction to Mozart: Miscellaneous Pieces for Pianoforte. London, Associated Board of the Royal schools of Music.

Its rarity makes the augmented triad a special chord that touches on the atonal. Its uses to 'suspend' tonality are famous; for example, in Arnold Schoenberg's "Walzer" (Fünf Klavierstücke Op. 23 No. 5). An earlier example may be found at the opening of Franz Liszt's Faust Symphony, where a sequence of augmented triads unfolds as arpeggios: File:Liszt 'Faust' Symphony, opening 01.wav File:Liszt 'Faust' Symphony, opening 02.png

However, the augmented triad occurs in tonal music, with a perfectly tonal meaning, since at least J.S. Bach. See the "surprising" Whittaker, W.G. (1924, p.34), Bach's Cantatas, Oxford University Press first chord (D–F{{music|sharp}}–B{{music|flat}}) in the opening chorus to his cantata Ach Gott, vom Himmel sieh darein, BWV 2: File:Bach Cantata BWV 2 opening chorus 01.wavFile:Bach Cantata BWV 2 opening chorus 02.png. Other examples may be found in the work of Joseph Haydn. See, for example, bars 5-8 of the Trio from Haydn's String Quartet Op. 54 No. 2:For further discussion, see {{cite journal|first=Mark|last=Ellis|title=A Chord in Time: The Evolution of the Augmented Sixth from Monteverdi to Mahler|location=Farnham|publisher=Ashgate|date=2010|pages=23, 30–31}} File:Haydn Quartet, Op. 54 No. 2, minuet, Trio section 01.wavFile:Haydn Quartet, Op. 54 No. 2, minuet, Trio section.png -also in Richard Wagner's Siegfried Idyll: File:Wagner Siegfried Idyll bars 148-153.wavFile:Wagner Siegfried Idyll bars 148-153.png-and in Chopin’s stormy Prelude No. 24. The left hand piano arpeggios outline an augmented triad (D{{music|flat}}–F-A) in bars 47-50. The sudden change in dynamics from forte to a hushed piano in these bars highlights the emotional intensity of this passage: File:Chopin Prelude No. 24, bars 43-51.wav File:Chopin Prelude No. 24, bars 43-52.pngAn augmented triad results diatonically in minor mode from a dominant chord where the fifth (the second degree) is replaced by the third degree, as an anticipation of the resolution chord. Johannes Brahms's Tragic Overture also features the chord prominently (A–C{{music|sharp}}–E{{music|sharp}}), in alternation with the regular dominant (A–C{{music|sharp}}–E). In this example one can also see other aspect of the appeal of the chord to composers: it is a 'conflation' of the fifth degree and the third degree, the usual contrasting keys of a piece in the minor mode.

The "whirl of the final bars" of Mahler’s Symphony No. 7De La Grange, H. (1999, p.880) Gustav Mahler, Volume 3 Oxford University Press. features an abrupt interpolation of an augmented chord (E–G{{music|sharp}}–C) in the penultimate bar, before the final chord of C major:File:Mahler Symphony No. 7 concluding bars 01.wavFile:Mahler Symphony No. 7 concluding bars.png

With the lead of Franz Schubert (in his Wanderer Fantasy), Romantic composers started organizing many pieces by descending major thirds, which can be seen as a large-scale application of the augmented triad (although it probably arose from other lines of development not necessarily connected to the augmented triad). This kind of organization is common; in addition to Schubert, it is found in music of Franz Liszt, Nikolai Rimsky-Korsakov, Louis Vierne and Richard Wagner, among others.

Expressive and dramatic potential

The striking sound of the augmented triad lends itself to effective word painting, especially when conveying strong emotion. The first song in Robert Schumann’s song cycle Frauen-Liebe und Leben uses the chord (F{{music|sharp}}-B{{music|flat}}-D) on the second syllable of the word “empor” to convey the intensity of the singer’s feeling for her beloved:. File:Schumann, Frauen-Liebe und Leben, No. 1.wav File:Schumann, Frauen-Liebe und Leben, No. 1.pngIn Purcell’s opera Dido and Aeneas, on the other hand, the malign Sorceress planning Dido’s downfall sings the word “hate” Adams, M. (1995, p. 279), Henry Purcell, the origins and development of his musical style. Cambridge University Press. to the accompaniment of an augmented chord (F–A–D{{music|flat}}) :File:Dido & Aeneas from Act II, scene 1.wavFile:Dido & Aeneas from Act II, scene 1.png

In J.S. Bach’s Magnificat, the composer sets the words “dispersit superbos mente cordis sui” (He hath scattered the proud in the imagination of their hearts) with a powerful chord sequence starting with an augmented triad (F{{music|sharp}}–A{{music|sharp}}-D) on the word “mente.” The passage is made all the more effective by being inititated by a sudden tempo change and a beat’s silence. This gives the chord considerable dramatic clout:File:Bach Magnificat, BWV 243, Fecit Potentiam, bars 20-32.wavFile:Bach Magnificat, BWV 243, Fecit Potentiam, bars 20-32.png

In the opening scene of Wagner’s Götterdämmerung, one of the three Norns conveys her dread and uncertainty about what is going to pass. “Sing, sister, wind the rope of fate.” The underlying orchestral accompaniment contains ominous augmented chords of “ambiguous tonality.”:Donington, R, (1963, p.218), Wagner’s Ring and its Symbols. London, Faber.File:Wagner from Gotterdamerung - Norn's fateful prediction 01.wavFile:Wagner from Gotterdamerung - Norn's fateful prediction.png - Norn's fateful prediction]]

Tuning

File:Comparison of augmented triads (0,4,8).pngIn just intonation, the interval between two major thirds and an octave, 2:(5:4)2, is 32:25, which is flatter by a septimal kleisma of size 225:224 than the septimal major third with ratio 9:7. While septimal meantone temperament tempers out the septimal kleisma, some other temperaments, for example miracle temperament, do so also, and in all of these temperaments the augmented triad may be identified with a circle of two major and one septimal major thirds, making up an octave.

Augmented chord table

:

class="wikitable"

!Chord

!Root

!Major third

!Augmented fifth

C{{music|b}}aug

|C{{music|b}}

|E{{music|b}}

|G

Caug

|C

|E

|G{{music|#}}

C{{music|#}}aug

|C{{music|#}}

|E{{music|#}} (F)

|G{{music|##}} (A)

D{{music|b}}aug

|D{{music|b}}

|F

|A

Daug

|D

|F{{music|#}}

|A{{music|#}}

D{{music|#}}aug

|D{{music|#}}

|F{{music|##}} (G)

|A{{music|##}} (B)

E{{music|b}}aug

|E{{music|b}}

|G

|B

Eaug

|E

|G{{music|#}}

|B{{music|#}} (C)

E{{music|#}}aug

|E{{music|#}}

|G{{music|##}} (A)

|B{{music|##}} (C{{music|#}})

F{{music|b}}aug

|F{{music|b}}

|A{{music|b}}

|C

Faug

|F

|A

|C{{music|#}}

F{{music|#}}aug

|F{{music|#}}

|A{{music|#}}

|C{{music|##}} (D)

G{{music|b}}aug

|G{{music|b}}

|B{{music|b}}

|D

Gaug

|G

|B

|D{{music|#}}

G{{music|#}}aug

|G{{music|#}}

|B{{music|#}} (C)

|D{{music|##}} (E)

A{{music|b}}aug

|A{{music|b}}

|C

|E

Aaug

|A

|C{{music|#}}

|E{{music|#}} (F)

A{{music|#}}aug

|A{{music|#}}

|C{{music|##}} (D)

|E{{music|##}} (F{{music|#}})

B{{music|b}}aug

|B{{music|b}}

|D

|F{{music|#}}

Baug

|B

|D{{music|#}}

|F{{music|##}} (G)

B{{music|#}}aug

|B{{music|#}}

|D{{music|##}} (E)

|F{{music|#}}{{music|##}} (G{{music|#}})

See also

Notes

{{reflist}}

Further reading

  • {{cite book|last=Kroepel|first=Bob|title=Deluxe Encyclopedia of Piano Chords|publisher=Mel Bay|date=1993|page=12|isbn=978-0-87166-579-9}}
  • {{cite book|first=Mark|last=Ellis|title=A Chord in Time: The Evolution of the Augmented Sixth from Monteverdi to Mahler|location=Farnham|publisher=Ashgate|date=2010|pages=23, 30–31}}

{{Chords}}

{{DEFAULTSORT:Augmented Triad}}

Category:Chords

Category:Musical symmetry