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{ \new Staff \with{ \magnifyStaff #3/2 } << \time 2/1 \override Score.TimeSignature #'stencil = ##f { \clef bass d1_D \clef treble d'_D } >> }

D[1] is a musical note a whole tone above C, and is known as Re within the fixed-Do solfege system. Its enharmonic equivalents are Cdouble sharp (C-double sharp) and Edouble flat (E-double flat). It is the third 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 (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


Common scales beginning on D

Diatonic scales

Jazz melodic minor

See also


  1. ^ "D note",