D♯5 / E♭5
622.254Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
75
Piano key
55
Octave
5
Frequency
622.254 Hz
Period
1.6071 ms
Wavelength
0.5512 m
Pitch class
D♯
Notation
SPN
MIDI is the note number synths and software pass around (0–127). Pitch class is the note without its octave — all the D♯s share one. Enharmonic spellings (D♯5 and E♭5) name the same pitch two ways.
At other reference pitches
| Reference (A4) | D♯5 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 610.94 Hz | the alternative-tuning circle |
| 440 Hzstandard | 622.254 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 625.082 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 626.497 Hz | some sharper continental orchestras |
Every row is D♯5 — only the A4 you tune to changes. A frequency scales straight with the reference: D♯5 at 432 Hz is the 440 Hz value times 432⁄440.
Move around
Every D♯
Chords with D♯ in them
D♯ appears in each of these — see the whole chord grid.