When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of Middle E (E4) is approximately 329.628 Hz. See pitch (music) for a discussion of historical variations in frequency.
|Scientific designation||Helmholtz designation||Octave name||Frequency (Hz)|
|E-1||E or E or EEEE||Subsubcontra||10.301|
|E0||E or E or EEE||Subcontra||20.602|
|E1||E? or ?E or EE||Contra||41.203|
F♭ is a common enharmonic equivalent of E, but is not regarded as the same note. F♭ is commonly found after E♭ in the same measure in pieces where E♭ is in the key signature, in order to represent a diatonic, rather than a chromatic semitone; writing an E♭ with a following E♮ is regarded as a chromatic alteration of one scale degree.