D♯ (musical note)

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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.

• 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♯

• 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♯

• D♯ Ascending Melodic Minor: D♯ E♯ F♯ G♯ A♯ B♯ C D♯
• 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♯

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

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