C (musical note)

note in western music

C or Do is the first note of the C major scale.

Middle C audio speaker iconPlay 

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz) Other names Audio
C−1 C͵͵͵ or ͵͵͵C or CCCC Octocontra 8.176  Play 
C0 C͵͵ or ͵͵C or CCC Subcontra 16.352  Play 
C1 C͵ or ͵C or CC Contra 32.703  Play 
C2 C Great 65.406 Low C, cello C, 8' C (see organ pipe length)  Play 
C3 c Small 130.813 4' C or tenor C (organ), viola C  Play 
C4 c′ One-lined 261.626 Middle C  Play 
C5 c′′ Two-lined 523.251 Treble C, high C (written an octave higher for tenor voices)[1]  Play 
C6 c′′′ Three-lined 1046.502 High C (soprano)  Play 
C7 c′′′′ Four-lined 2093.005 Double high C[source?]  Play 
C8 c′′′′′ Five-lined 4186.009 Eighth octave C, triple high C  Play 
C9 c′′′′′′ Six-lined 8372.018 Quadruple high C  Play 
C10 c′′′′′′′ Seven-lined 16744.036 Quintuple high C  Play 


  1. "The Note That Makes Us Weep" by Daniel J. Wakin, The New York Times, September 9, 2007