D♯ (musical note)

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 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	Octave name	Frequency (Hz)
D♯−1	D♯͵͵͵ or ͵͵͵D♯ or DDDD♯	Subsubcontra	9.723
D♯0	D♯͵͵ or ͵͵D♯ or DDD♯	Subcontra	19.445
D♯1	D♯͵ or ͵D♯ or DD♯	Contra	38.891
D♯2	D♯	Great	77.782
D♯3	d♯	Small	155.563
D♯4	d♯′	One-lined	311.127
D♯5	d♯′′	Two-lined	622.254
D♯6	d♯′′′	Three-lined	1244.508
D♯7	d♯′′′′	Four-lined	2489.016
D♯8	d♯′′′′′	Five-lined	4978.032
D♯9	d♯′′′′′′	Six-lined	9956.063
D♯10	d♯′′′′′′′	Seven-lined	19912.127

Scales

Common scales beginning on D♯

• D♯ major: D♯ E♯ F G♯ A♯ B♯ C D♯
• D♯ natural minor: D♯ E♯ F♯ G♯ A♯ B C♯ D♯
• D♯ harmonic minor: D♯ E♯ F♯ G♯ A♯ B C D♯
• D♯ melodic minor ascending: D♯ E♯ F♯ G♯ A♯ B♯ C D♯
• D♯ Melodic Minor Descending: D♯ C♯ B A♯ G♯ F♯ E♯ D♯

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♯

Alternate Scales

• D♯ Dorian ♭2: D♯ E F♯ G♯ A♯ B♯ C♯ D♯
• D♯ Lydian augmented: D♯ E♯ F G A B♯ C D♯
• D♯ Lydian dominant: D♯ E♯ F G A♯ B♯ C♯ D♯
• D♯ Mixolydian ♭6: D♯ E♯ F G♯ A♯ B C♯ D♯
• D♯ Locrian ♮2: D♯ E♯ F♯ G♯ A B C♯ D♯
• D♯ altered: D♯ E F♯ G A B C♯ D♯

See also

• Piano key frequencies
• D-sharp minor
• D-sharp major