The Cis Note
Cis is a black key, immediately next to C. It sounds at 277.18 Hz in octave 4.
Cis on the piano
Key facts
- On the keyboard
- a black key, immediately next to C.
- Frequency (octave 4)
- 277.18 Hz
- MIDI number (octave 4)
- 61
- Also written as
- Des
- In key signatures
- The 2 sharp in the order of sharps.
Cis and its enharmonic spellings
Cis can also be written as Des. These are enharmonic equivalents: the same pitch, the same key on the piano, a different name on the page. Which spelling is correct depends on the key and on how the note functions, not on the sound.
Cis frequency in every octave
Frequencies for Cis in scientific pitch notation, with A4 tuned to 440 Hz.
| Note | MIDI | Frequency |
|---|---|---|
| Cis1 | 25 | 34.65 Hz |
| Cis2 | 37 | 69.3 Hz |
| Cis3 | 49 | 138.59 Hz |
| Cis4 | 61 | 277.18 Hz |
| Cis5 | 73 | 554.37 Hz |
| Cis6 | 85 | 1108.73 Hz |
| Cis7 | 97 | 2217.46 Hz |
Chords on Cis
The most common chords built with Cis as the root.
Scales starting on Cis
Keys and scales that use Cis as their tonic.
All notes
Usein kysytyt kysymykset
Where is Cis on the piano?
Cis is a black key, immediately next to C.
What frequency is Cis4?
Cis4 sounds at 277.18 Hz with A4 tuned to 440 Hz.
What is another name for Cis?
Cis can also be written as Des. They are the same pitch spelled differently.
