Piano note
A♯7 / B♭7 Piano Note Frequency
A♯7 / B♭7 is key 86 of the 88 on a standard piano, with a frequency of 3729.31 Hz when the piano is tuned to A4 = 440 Hz.
3729.31 Hz
A♯7 / B♭7 at a glance
- Frequency (A4 = 440 Hz)
- 3729.31 Hz
- At A4 = 442 Hz
- 3746.26 Hz
- At A4 = 432 Hz
- 3661.50 Hz
- Piano key number
- 86 / 88
- MIDI note number
- 106
- Octave
- 7
- Key colour
- Black key
- Wavelength in air
- 9.2 cm
- Period (one vibration)
- 0.268 ms
- Register
- High 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: A♯7 and B♭7. They are the same key and the same frequency on a piano.
At the top of the keyboard the notes still have three short steel strings, but on most pianos the highest keys have no dampers, because the strings die away quickly on their own. The tone is short and bright, and tuners stretch these notes noticeably sharp of the theoretical frequency.
Neighbouring keys
Is your A♯7 in tune?
Play A♯7 on your piano and our free online tuner will show how many cents it is from 3729.31 Hz.
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