Piano note
A♯1 / B♭1 Piano Note Frequency
A♯1 / B♭1 is key 14 of the 88 on a standard piano, with a frequency of 58.27 Hz when the piano is tuned to A4 = 440 Hz.
58.27 Hz
A♯1 / B♭1 at a glance
- Frequency (A4 = 440 Hz)
- 58.27 Hz
- At A4 = 442 Hz
- 58.54 Hz
- At A4 = 432 Hz
- 57.21 Hz
- Piano key number
- 14 / 88
- MIDI note number
- 34
- Octave
- 1
- Key colour
- Black key
- Wavelength in air
- 5.89 m
- Period (one vibration)
- 17.16 ms
- Register
- Bass
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♯1 and B♭1. They are the same key and the same frequency on a piano.
In the bass section the strings are usually wound with copper, and on most pianos each note has two strings that must be tuned in unison with each other. Exactly where the wound strings end and how many strings each note has depends on the piano model and size.
Neighbouring keys
Is your A♯1 in tune?
Play A♯1 on your piano and our free online tuner will show how many cents it is from 58.27 Hz.
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