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Recognised as Musical note

A3

  • A3
  • 220 Hz
  • MIDI 57

A3 is MIDI note 57, sounding at 220 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 1.5591 m, and it sits in octave 3.

Pitch

Scientific pitch notationA3
MIDI note number57
Frequency220 Hzequal temperament, A4 = 440 Hz, a convention rather than a constant
Pitch classA (9)
Octave3

As a sound wave

Wavelength in air1.5591 mat 343 m/s, dry air at 20 °C
Period4.5455 ms
Frequency one octave up440 Hzdoubling the frequency
Frequency one octave down110 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age

Intervals from here

Octave belowA2 · 110 Hz
Perfect fifth belowD3 · 146.83 Hz
Semitone belowG#3 · 207.65 Hz
Semitone aboveA#3 · 233.08 Hz
Major third aboveC#4 · 277.18 Hz
Perfect fifth aboveE4 · 329.63 Hz
Octave aboveA4 · 440 Hz

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Nearby notes

The same note in other octaves

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Every value on this page was computed from “note a3” by Nerdulator’s reference engine. Nothing here was retrieved from a database of answers or written by a model.