High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! C or Do is the first note of the fixed-Do solfege. In classical music, the expression "Middle C" refers to the note "C" located exactly between the two staves of the grand staff and near the top and bottom, respectively, of the bass and soprano voices. 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.

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