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.[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♯
Alternate Scales
References
See also
