Altered seventh chord

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Augmented seventh chord on C. About this sound Play 
Altered dominant seventh chord arising from voice leading in Chopin's Sonata, Op. 35.[1] About this sound Play 
The augmented fifth often appears in the soprano voice, as here in Franck's Symphonic Variations.[1] About this sound Play 

An altered seventh chord is a seventh chord with one, or all,[2] of its factors raised or lowered by a semitone (altered), for example the augmented seventh chord (7+ or 7+5) featuring a raised fifth[3] (C7+5: CEGB). Most likely the fifth, then the ninth, then the thirteenth.[2]

In classical music, the raised fifth is more common than the lowered fifth, which in a dominant chord adds Phrygian flavor through the introduction of scale degree 2.[1] (for example, in C the dominant is G, its fifth is D, the second scale degree)

See also [edit]

Sources [edit]

  1. ^ a b c Aldwell, Edward; Schachter, Carl; and Cadwallader, Allen (2010). Harmony & Voice Leading, p.601. ISBN 9780495189756.
  2. ^ a b Davis, Kenneth (2006). The Piano Professor Easy Piano Study, p.78. ISBN 9781430303343.
  3. ^ Christiansen, Mike (2004). Mel Bay's Complete Jazz Guitar Method, Volume 1, p.45. ISBN 9780786632633.