The 라♯ Note
라♯ is a black key, immediately next to A. It sounds at 466.16 Hz in octave 4.
라♯ on the piano
Key facts
- On the keyboard
- a black key, immediately next to A.
- Frequency (octave 4)
- 466.16 Hz
- MIDI number (octave 4)
- 70
- Also written as
- 시♭
- In key signatures
- The 5 sharp in the order of sharps.
라♯ and its enharmonic spellings
라♯ can also be written as 시♭. 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.
라♯ frequency in every octave
Frequencies for 라♯ in scientific pitch notation, with A4 tuned to 440 Hz.
| Note | MIDI | Frequency |
|---|---|---|
| 라♯1 | 34 | 58.27 Hz |
| 라♯2 | 46 | 116.54 Hz |
| 라♯3 | 58 | 233.08 Hz |
| 라♯4 | 70 | 466.16 Hz |
| 라♯5 | 82 | 932.33 Hz |
| 라♯6 | 94 | 1864.66 Hz |
| 라♯7 | 106 | 3729.31 Hz |
Chords on 라♯
The most common chords built with 라♯ as the root.
Scales starting on 라♯
Keys and scales that use 라♯ as their tonic.
All notes
자주 묻는 질문
Where is 라♯ on the piano?
라♯ is a black key, immediately next to A.
What frequency is 라♯4?
라♯4 sounds at 466.16 Hz with A4 tuned to 440 Hz.
What is another name for 라♯?
라♯ can also be written as 시♭. They are the same pitch spelled differently.
