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D♯ (musical note)

D Sharp

D (D-sharp) or re dièse is the fourth semitone of the solfège. It lies a chromatic semitone above D and a diatonic semitone below E, thus being enharmonic to mi bémol or E. However, in some temperaments, it is not the same as E. E is a perfect fourth above B, whereas D 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 Octave name Frequency (Hz)
D−1 D͵͵͵ or ͵͵͵D or DDDD Subsubcontra 9.723
D0 D͵͵ or ͵͵D or DDD Subcontra 19.445
D1 D͵ or ͵D or DD Contra 38.891
D2 D Great 77.782
D3 d Small 155.563
D4 d One-lined 311.127
D5 d′′ Two-lined 622.254
D6 d′′′ Three-lined 1244.508
D7 d′′′′ Four-lined 2489.016
D8 d′′′′′ Five-lined 4978.032
D9 d′′′′′′ Six-lined 9956.063
D10 d′′′′′′′ Seven-lined 19912.127

Scales

Diatonic scales

• 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