D♯ (musical note)

D (D-sharp) or Re Dièse is the fourth semitone of the solfege. It lies a chromatic semitone above D and a diatonic semitone below E, thus being enharmonic to Mi Bémol or E (E flat). However, in some temperaments, it is not the same as E-flat. E-flat is a perfect fifth below B-flat, whereas D sharp is a major third above B.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the D above middle C (or D4) is approximately 311.127 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 9.723
D0 D͵͵ or ͵͵D or DDD (-vD) Subcontra 19.445
D1 D͵ or ͵D or DD (-wD) Contra 38.891
D2 D (-xD) Great 77.782
D3 d (-yD) Small 155.563
D4 d (zD) One-lined 311.127
D5 d (yD) Two-lined 622.254
D6 d (xD) Three-lined 1244.508
D7 d (wD) Four-lined 2489.016
D8 d (vD) Five-lined 4978.032
D9 d (uD) Six-lined 9956.063
D10 d (tD) Seven-lined 19912.127


Common scales beginning on D

Diatonic scales

Jazz Melodic Minor

See also

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