The A♭ Note
A♭ is a black key, immediately next to A. It sounds at 415.3 Hz in octave 4.
A♭ on the piano
Key facts
- On the keyboard
- a black key, immediately next to A.
- Frequency (octave 4)
- 415.3 Hz
- MIDI number (octave 4)
- 68
- Also written as
- G♯
- In key signatures
- The 3 flat in the order of flats.
A♭ and its enharmonic spellings
A♭ can also be written as G♯. 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.
A♭ frequency in every octave
Frequencies for A♭ in scientific pitch notation, with A4 tuned to 440 Hz.
| Note | MIDI | Frequency |
|---|---|---|
| A♭1 | 32 | 51.91 Hz |
| A♭2 | 44 | 103.83 Hz |
| A♭3 | 56 | 207.65 Hz |
| A♭4 | 68 | 415.3 Hz |
| A♭5 | 80 | 830.61 Hz |
| A♭6 | 92 | 1661.22 Hz |
| A♭7 | 104 | 3322.44 Hz |
Chords on A♭
The most common chords built with A♭ as the root.
Scales starting on A♭
Keys and scales that use A♭ as their tonic.
All notes
Vanliga frågor
Where is A♭ on the piano?
A♭ is a black key, immediately next to A.
What frequency is A♭4?
A♭4 sounds at 415.3 Hz with A4 tuned to 440 Hz.
What is another name for A♭?
A♭ can also be written as G♯. They are the same pitch spelled differently.
