D♯ (musical note)

${ \new Staff \with{ \magnifyStaff #3/2 } << \time 2/1 \override Score.TimeSignature #'stencil = ##f { \clef bass dis1_D-sharp \clef treble dis' } >> }$

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.^[1] 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♯

References

^ Suits, B. H. (1998). "Physics of Music Notes - Scales: Just vs Equal Temperament". MTU.edu. Michigan Technological University. Retrieved 5 February 2024.