Piano note
C♯6 / D♭6 Piano Note Frequency
C♯6 / D♭6 is key 65 of the 88 on a standard piano, with a frequency of 1108.73 Hz when the piano is tuned to A4 = 440 Hz.
1108.73 Hz
C♯6 / D♭6 at a glance
- Frequency (A4 = 440 Hz)
- 1108.73 Hz
- At A4 = 442 Hz
- 1113.77 Hz
- At A4 = 432 Hz
- 1088.57 Hz
- Piano key number
- 65 / 88
- MIDI note number
- 85
- Octave
- 6
- Key colour
- Black key
- Wavelength in air
- 30.9 cm
- Period (one vibration)
- 0.902 ms
- Register
- Treble
Wavelength assumes sound travels at 343 m/s (air at about 20 °C).
About this part of the keyboard
This black key has two names: C♯6 and D♭6. They are the same key and the same frequency on a piano.
In the treble each note has three short plain steel strings. Short, stiff strings react to the smallest movement of the tuning pin, and tuners set these notes slightly sharp of the theoretical frequency so the octaves sound clean.
Neighbouring keys
Is your C♯6 in tune?
Play C♯6 on your piano and our free online tuner will show how many cents it is from 1108.73 Hz.
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