D♯ (musical note)

D♯ (D-sharp) or ré 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.

[1]

Scientific designation	Helmholtz designation	Octave name	Frequency (Hz)	MIDI note number
D♯₋₁	D♯͵͵͵ or ͵͵͵D♯ or DDDD♯	Subsubcontra	9.723	3
D♯₀	D♯͵͵ or ͵͵D♯ or DDD♯	Subcontra	19.445	15
D♯₁	D♯͵ or ͵D♯ or DD♯	Contra	38.891	27
D♯₂	D♯	Great	77.782	39
D♯₃	d♯	Small	155.563	51
D♯₄	d♯′	One-lined	311.127	63
D♯₅	d♯′′	Two-lined	622.254	75
D♯₆	d♯′′′	Three-lined	1244.508	87
D♯₇	d♯′′′′	Four-lined	2489.016	99
D♯₈	d♯′′′′′	Five-lined	4978.032	111
D♯₉	d♯′4′′′′′	Six-lined	9956.063	123
D♯₁₀	d♯′′′′′′′	Seven-lined	19912.127	N/A

D♯ (musical note)

Designation by octave

Scales

Common scales beginning on D♯

Diatonic scales

Alternate Scales

References

See also

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