Supriya Ghosh (Editor)

D flat minor

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Parallel key
  
D♭ major

Enharmonic
  
C♯ minor

D-flat minor

Relative key
  
F♭ major enharmonic: E major

Dominant key
  
A♭ minor enharmonic: G♯ minor

Subdominant
  
G♭ minor enharmonic: F♯ minor

D-flat minor is a theoretical key based on the musical note D, consisting of the pitches D, E, F, G, A, B, C and D.  Play  Its key signature has six flats and one double flat. The harmonic minor raises C♭ to C.

D♭ minor is usually notated as the enharmonic key of C♯ minor, as in the second and third measures of Amy Beach's Canticle of the Sun. However, two of Verdi's most well-known operas, La traviata and Rigoletto, unusually, both end very decisively in D minor (although written with the five-flat key signature of the parallel major). Mahler's thematic motif "der kleine Appell" ("call to order") from his Fourth and Fifth Symphonies uses both notations: in his Symphony No. 4 (first movement) it is in D minor, but in his Symphony No. 5 it is in C minor. In the Adagio of his Symphony No. 9 a solo bassoon interpolation following the main theme appears first in D minor, returning twice more notated in C minor. Likewise, in the Adagio of Bruckner's Symphony No. 8, phrases that are tonally in D minor are notated as C minor.

References

D-flat minor Wikipedia