Recognised as Musical note

G#0

G#0
25.96 Hz
MIDI 20

G#0 (enharmonically Ab0) is MIDI note 20, sounding at 25.957 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 13.2144 m, and it sits in octave 0.

Pitch

Scientific pitch notationG#0

Enharmonic equivalentAb0the same pitch in equal temperament, spelled differently

MIDI note number20

Frequency25.9565 Hzequal temperament, A4 = 440 Hz, a convention rather than a constant

Pitch classG# (8)

Octave0

As a sound wave

Wavelength in air13.2144 mat 343 m/s, dry air at 20 °C

Period38.5259 ms

Frequency one octave up51.913 Hzdoubling the frequency

Frequency one octave down12.978 Hz

AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age

Intervals from here

Octave belowG#-1 · 12.98 Hz

Perfect fifth belowC#0 · 17.32 Hz

Semitone belowG0 · 24.5 Hz

Semitone aboveA0 · 27.5 Hz

Major third aboveC1 · 32.7 Hz

Perfect fifth aboveD#1 · 38.89 Hz

Octave aboveG#1 · 51.91 Hz

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The same note in other octaves

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