Musical note

D#1

D#1
38.89 Hz
MIDI 27

D#1 (enharmonically Eb1) is MIDI note 27, sounding at 38.891 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 8.8196 m, and it sits in octave 1.

Pitch

Scientific pitch notationD#1

Enharmonic equivalentEb1the same pitch in equal temperament, spelled differently

MIDI note number27

Frequency38.8909 Hzequal temperament, A4 = 440 Hz, a convention rather than a constant

Pitch classD# (3)

Octave1

As a sound wave

Wavelength in air8.8196 mat 343 m/s, dry air at 20 °C

Period25.713 ms

Frequency one octave up77.782 Hzdoubling the frequency

Frequency one octave down19.445 Hz

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

Intervals from here

Octave belowD#0 · 19.45 Hz

Perfect fifth belowG#0 · 25.96 Hz

Semitone belowD1 · 36.71 Hz

Semitone aboveE1 · 41.2 Hz

Major third aboveG1 · 49 Hz

Perfect fifth aboveA#1 · 58.27 Hz

Octave aboveD#2 · 77.78 Hz

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Nearby notes

The same note in other octaves

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