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.

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♯