D (musical note)

"Re (musical note)" redirects here. For its use in movable-do system, see Solfège.

D is a musical note a whole tone above C, and is known as Re within the fixed-Do solfege system. An enharmonic note is C, which is a diatonic semitone below D♯.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle D (D₄) is approximately 293.665 Hz. See pitch for a discussion of historical variations in frequency.

Designation by octave

Scientific designation	Helmholtz designation	Bilinear music notation	Octave name	Frequency (Hz)
D-1	D͵͵͵ or ͵͵͵D or DDDD	(-uD)	Subsubcontra	9.177
D0	D͵͵ or ͵͵D or DDD	(-vD)	Subcontra	18.354
D1	D͵ or ͵D or DD	(-wD)	Contra	36.708
D2	D	(-xD)	Great	73.416
D3	d	(-yD)	Small	146.832
D4	d′	(zD)	One-lined	293.665
D5	d′′	(yD)	Two-lined	587.330
D6	d′′′	(xD)	Three-lined	1174.659
D7	d′′′′	(wD)	Four-lined	2349.318
D8	d′′′′′	(vD)	Five-lined	4698.636
D9	d′′′′′′	(uD)	Six-lined	9397.273
D10	d′′′′′′′	(tD)	Seven-lined	18794.545

Scales

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

See also

• Piano key frequencies
• D major
• D minor