E1
41.203Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
28
Piano key
8
Octave
1
Frequency
41.203 Hz
Period
24.2701 ms
Wavelength
8.3246 m
Pitch class
E
Notation
SPN
MIDI is the note number synths and software pass around (0–127). Pitch class is the note without its octave — all the Es share one.
At other reference pitches
| Reference (A4) | E1 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 40.454 Hz | the alternative-tuning circle |
| 440 Hzstandard | 41.203 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 41.391 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 41.484 Hz | some sharper continental orchestras |
Every row is E1 — only the A4 you tune to changes. A frequency scales straight with the reference: E1 at 432 Hz is the 440 Hz value times 432⁄440.
About this note
The lowest open string of the double bass in standard tuning (E-A-D-G). At around 41 Hz you feel this note as much as you hear it.
Move around
Every E
Chords with E in them
E appears in each of these — see the whole chord grid.