D♭ (musical note)

D♭ (also called a re bémol) is the first note of the D♭ major scale.

Designation by octave

Scientific designation	Helmholtz designation	Octave name	Frequency (Hz)
D♭−1	D♭͵͵͵ or ͵͵͵D♭ or DDDD♭	Subsubcontra	8.662
D♭0	D♭͵͵ or ͵͵D♭ or DDD♭	Subcontra	17.324
D♭1	D♭͵ or ͵D♭ or DD♭	Contra	34.648
D♭2	D♭	Great	69.296
D♭3	d♭	Small	138.591
D♭4	d♭′	One-lined	277.183
D♭5	d♭′′	Two-lined	554.365
D♭6	d♭′′′	Three-lined	1108.731
D♭7	d♭′′′′	Four-lined	2217.461
D♭8	d♭′′′′′	Five-lined	4434.922
D♭9	d♭′′′′′′	Six-lined	8869.844
D♭10	d♭′′′′′′′	Seven-lined	17739.688

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♭