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 D♯4) 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
D♯0 D♯͵͵ or ͵͵D♯ or DDD♯ (-vD♯) Subcontra 19.445
D♯1 D♯͵ or ͵D♯ or DD♯ (-wD♯) Contra 38.891
D♯2 D♯ (-xD♯) Great 77.782
D♯3 d♯ (-yD♯) Small 155.563
D♯4 d♯′ (zD♯) One-lined 311.127
D♯5 d♯′′ (yD♯) Two-lined 622.254
D♯6 d♯′′′ (xD♯) Three-lined 1244.508
D♯7 d♯′′′′ (wD♯) Four-lined 2489.016
D♯8 d♯′′′′′ (vD♯) Five-lined 4978.032
D♯9 d♯′′′′′′ (uD♯) Six-lined 9956.063
D♯10 d♯′′′′′′′ (tD♯) Seven-lined 19912.127

Scales

Common scales beginning on D♯

Diatonic scales

Jazz Melodic Minor

See also

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