E♭ is a black key, immediately next to E. It sounds at 311.13 Hz in octave 4.
E♭ can also be written as D♯. These are enharmonic equivalents: the same pitch, the same key on the piano, a different name on the page. Which spelling is correct depends on the key and on how the note functions, not on the sound.
Frequencies for E♭ in scientific pitch notation, with A4 tuned to 440 Hz.
| Note | MIDI | Frequency |
|---|---|---|
| E♭1 | 27 | 38.89 Hz |
| E♭2 | 39 | 77.78 Hz |
| E♭3 | 51 | 155.56 Hz |
| E♭4 | 63 | 311.13 Hz |
| E♭5 | 75 | 622.25 Hz |
| E♭6 | 87 | 1244.51 Hz |
| E♭7 | 99 | 2489.02 Hz |
The most common chords built with E♭ as the root.
Keys and scales that use E♭ as their tonic.
E♭ is a black key, immediately next to E.
E♭4 sounds at 311.13 Hz with A4 tuned to 440 Hz.
E♭ can also be written as D♯. They are the same pitch spelled differently.