Piano note
A1 Piano Note Frequency
A1 is key 13 of the 88 on a standard piano, with a frequency of 55.00 Hz when the piano is tuned to A4 = 440 Hz.
55.00 Hz
A1 at a glance
- Frequency (A4 = 440 Hz)
- 55.00 Hz
- At A4 = 442 Hz
- 55.25 Hz
- At A4 = 432 Hz
- 54.00 Hz
- Piano key number
- 13 / 88
- MIDI note number
- 33
- Octave
- 1
- Key colour
- White key
- Wavelength in air
- 6.24 m
- Period (one vibration)
- 18.18 ms
- Register
- Bass
Wavelength assumes sound travels at 343 m/s (air at about 20 °C).
About this part of the keyboard
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 A1 in tune?
Play A1 on your piano and our free online tuner will show how many cents it is from 55.00 Hz.
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