Recognised as Musical note

C#0

C#0
17.32 Hz
MIDI 13

C#0 (enharmonically Db0) is MIDI note 13, sounding at 17.324 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 19.7992 m, and it sits in octave 0.

Pitch

Scientific pitch notationC#0

Enharmonic equivalentDb0the same pitch in equal temperament, spelled differently

MIDI note number13

Frequency17.3239 Hzequal temperament, A4 = 440 Hz, a convention rather than a constant

Pitch classC# (1)

Octave0

As a sound wave

Wavelength in air19.7992 mat 343 m/s, dry air at 20 °C

Period57.7237 ms

Frequency one octave up34.648 Hzdoubling the frequency

Frequency one octave down8.662 Hz

AudibleOutside typical hearinghuman hearing runs roughly 20 Hz to 20 kHz and narrows with age

Intervals from here

Octave belowC#-1 · 8.66 Hz

Perfect fifth belowF#-1 · 11.56 Hz

Semitone belowC0 · 16.35 Hz

Semitone aboveD0 · 18.35 Hz

Major third aboveF0 · 21.83 Hz

Perfect fifth aboveG#0 · 25.96 Hz

Octave aboveC#1 · 34.65 Hz

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Nearby notes

The same note in other octaves

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