D (musical note)

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

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 C (C-double sharp) and E (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 293.665Hz.^[2] See pitch for a discussion of historical variations in frequency.

^ "D note", basicmusictheory.com
^ Suits, B. H. (1998). "Physics of Music Notes – Scales: Just vs Equal Temperament". Michigan Technological University. Retrieved 5 February 2024.^{[dead link]}

[1] "D note", basicmusictheory.com

[2] Suits, B. H. (1998). "Physics of Music Notes – Scales: Just vs Equal Temperament". Michigan Technological University. Retrieved 5 February 2024.^{[dead link]}

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