E-flat is a musical note that is one semitone lower than E and one semitone higher than D. It is commonly used in various musical scales and chords, particularly in Western music. The note E-flat can be represented on a piano keyboard as the black key immediately to the right of D and the black key immediately to the left of E. In terms of musical notation, E-flat is often denoted as "Eb." It plays a significant role in many compositions, especially in the E-flat major scale and E-flat minor scale. Additionally, several instruments, such as the E-flat trumpet and E-flat saxophone, are specifically tuned to this pitch.