D (musical note)
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 | Octave name | Frequency (Hz) |
|---|---|---|---|
| D−1 | D͵͵͵ or ͵͵͵D or DDDD | Subsubcontra | 9.177 |
| D0 | D͵͵ or ͵͵D or DDD | Subcontra | 18.354 |
| D1 | D͵ or ͵D or DD | Contra | 36.708 |
| D2 | D | Great | 73.416 |
| D3 | d | Small | 146.832 |
| D4 | d′ | One-lined | 293.665 |
| D5 | d′′ | Two-lined | 587.33 |
| D6 | d′′′ | Three-lined | 1174.659 |
| D7 | d′′′′ | Four-lined | 2349.318 |
| D8 | d′′′′′ | Five-lined | 4698.636 |
| D9 | d′′′′′′ | Six-lined | 9397.273 |
| D10 | d′′′′′′′ | Seven-lined | 18794.545 |
Scales
Common scales beginning on D
- D Natural Major: D E F♯ G A B C♯ D (conjugate with Phrygian)
- D Harmonic Major: D E F♯ G A B♭ C♯ D (conjugate with the keys on G Harmonic minor (start with D))
- D Melodic Major Ascending: D E F♯ G A B C♯ D (conjugate with Phrygian)
- D Melodic Major Descending: D C B♭ A G F♯ E D (self-conjugate)
- D Natural Minor: D E F G A B♭ C D (conjugate with Mixolydian)
- D Harmonic Minor: D E F G A B♭ C♯ D (conjugate with the keys on G Harmonic Major (start with D))
- D Melodic Minor Ascending: D E F G A B C♯ D (conjugate with Dorian ♭2)
- D Melodic Minor Descending: D C B♭ A G F E D (conjugate with Mixolydian)
Diatonic scales
- D Ionian: D E F♯ G A B C♯ D (conjugate with Phrygian)
- D Dorian: D E F G A B C D (self-conjugate)
- D Phrygian: D E♭ F G A B♭ C D (conjugate with Ionian)
- D Lydian: D E F♯ G♯ A B C♯ D (conjugate with Locrian)
- D Mixolydian: D E F♯ G A B C D (conjugate with Aeolian)
- D Aeolian: D E F G A B♭ C D (conjugate with Mixolydian)
- D Locrian: D E♭ F G A♭ B♭ C D (conjugate with Lydian)
Jazz melodic minor
- D Ascending Melodic Minor: D E F G A B C♯ D (conjugate with Dorian ♭2)
- D Dorian ♭2: D E♭ F G A B C D (conjugate with Ascending Melodic Minor)
- D Lydian Augmented: D E F♯ G♯ A♯ B C♯ D (conjugate with Altered)
- D Lydian Dominant: D E F♯ G♯ A B C D (conjugate with Locrian ♮2)
- D Mixolydian ♭6: D E F♯ G A B♭ C D (self-conjugate)
- D Locrian ♮2: D E F G A♭ B♭ C D (conjugate with Lydian Dominant)
- D Altered: D E♭ F G♭ A♭ B♭ C D (conjugate with Lydian Augmented)
We use the note D as the standard note, Dorian mode as the standard mode, and the conjugates are: D self, A-G, E-C, B-F, F#-Bb, C#-Eb, G#-Ab (enharmonic equivalent), ... (the (white or black) keys on the piano are symmetry)
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