Contents.Frequency Historically, has varied. For an instrument in tuned to the widely adopted in 1939, middle C has a frequency around 261.63 Hz (for other notes see ). Was originally proposed in 1713 by French physicist and based on the numerically convenient frequency of 256 Hz for middle C, all C's being. After the A440 pitch standard was adopted by musicians, the published new frequency tables for scientific use. A movement to restore the older A435 standard has used the banners 'Verdi tuning', 'philosophical pitch' or the easily confused.Octave nomenclature Middle C Middle C (the fourth C key from left on a standard 88-key keyboard) is designated C 4 in, the most commonly recognized in auditory sciencewhile both C 4 and the designation c′ are used in musical studies.
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Other note-octave systems, including those used by some makers of digital music keyboards, may refer to Middle C differently. In, Middle C is note number 60 which equates to C 4.While the expression Middle C is generally clear across instruments and clefs, some musicians naturally use the term to refer to the C note in the middle of their specific instrument's range. C 4 may be called Low C by someone playing a, which has a higher and narrower than the piano, while C 5 (523.251 Hz) would be Middle C. This technically inaccurate practice has led some pedagogues to encourage standardizing on C 4 as the definitive Middle C in instructional materials across all instruments.On the, middle-C is notated with a above the top line of the or below the bottom line of the.Other octaves In vocal music, the term High C (sometimes less ambiguously called Top C ) can refer to either the soprano's (1046.502 Hz; c′′′ in Helmholtz notation) or the tenor's C 5; both are written as the C two leger lines above the treble clef but the tenor voice sings an octave lower. The term Low C is sometimes used in vocal music to refer to C 2 because this is considered the divide between true basses and bass-baritones: a basso can sing this note easily whereas other male voices, including bass-baritones, typically cannot.Tenor C is an 's term for small C or C 3 (130.813 Hz), the note one below Middle C.
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