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 octave

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


Common scales beginning on D

Diatonic scales

Jazz Melodic Minor

See also

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