C (MUSICAL NOTE)

(Redirected from Middle C)
'Do' or 'C' is the first note of the fixed-Do solfege.
In Western music, the expression "'middle C'" refers to the note "'C'" (or "'Do'" in fixed-Do solfege) located exactly between the two staves of the grand staff, quoted as C4 in scientific pitch notation (also known as note-octave notation). It also tends to be to the middle of a keyboard, and it is near the top of the male vocal range and the bottom of the female vocal range.
Although C4 is commonly known by the expression "middle C", the expression is somewhat keyboard-specific: players of some instruments may refer to the note by another name, and may use "middle C" to refer to a different note. For example, that note (C4) would be "low C" to the player of a Western concert flute (as it is in the lowest register of that instrument — see playing range), while C5 would be middle C. Nevertheless, the expression "middle C" is generally clear across instruments and clefs.
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the middle C note is approximately 261.626 Hz. See pitch (music) for a discussion of historical variations in frequency.
For the frequency of each note on a standard piano, see Piano key frequencies.

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Designation by octave

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Designation by octave

Scientific Designation	Helmholtz Designation	Octave Name	Frequency (Hz)
C-1	Cˌˌˌ	Subsubcontra	8.176
C0	Cˌˌ	Subcontra	16.352
C1	Cˌ	Contra	32.703
C2	C	Great	65.406
C3	c	Small	130.813
C4	c′	One-lined	261.626
C5	c″	Two-lined	523.251
C6	c′″	Three-lined	1046.502
C7	c″″	Four-lined	2093.005
C8	c′″″	Five-lined	4186.009
C9	c″″″	Six-lined	8372.018

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