D♭ (musical note)

D♭ (D-flat) is a musical note lying a diatonic semitone above C and a chromatic semitone below D. It is thus enharmonic to C♯. In the French solfège it is known as re bémol. It is the second semitone of the solfège.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle D♭ (or D♭4) is approximately 277.183 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♭

Jazz melodic minor

 * 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♭