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D♭ (musical note)

D (D-flat) is a musical note lying a diatonic semitone above C and a chromatic semitone below D. It is thus enharmonic to C. In the French solfège it is known as re bémol.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle D (or D4) is approximately 277.183 Hz. See pitch (music) for a discussion of historical variations in frequency.

Designation by octaveEdit

Scientific designation Helmholtz designation Octave name Frequency (Hz)
D−1 D͵͵͵ or ͵͵͵D or DDDD Subsubcontra 8.662
D0 D͵͵ or ͵͵D or DDD Subcontra 17.324
D1 D͵ or ͵D or DD Contra 34.648
D2 D Great 69.296
D3 d Small 138.591
D4 d One-lined 277.183
D5 d′′ Two-lined 554.365
D6 d′′′ Three-lined 1108.731
D7 d′′′′ Four-lined 2217.461
D8 d′′′′′ Five-lined 4434.922
D9 d′′′′′′ Six-lined 8869.844
D10 d′′′′′′′ Seven-lined 17739.688


Common scales beginning on DEdit

Diatonic scalesEdit

  • D Ionian: D E F G A B C D
  • D Dorian: D E F G A B C D
  • D Phrygian: D E  F G A B  C D
  • D Lydian: D E F G A B C D
  • D Mixolydian: D E F G A B C D
  • D Aeolian: D E F G A B  C D
  • D Locrian: D E  F G A  B  C D

Jazz melodic minorEdit

See alsoEdit