E7
E7 (E Dominant 7th) is a staple in blues guitar. It consists of E, G#, B, and D notes.
Guitar Fretboard
Piano Keys
C
D
E
F
G
A
B
Notes: E - G# - B - D
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How to Play E7 Chord
The E7 chord is made up of the notes E, G#, B, D. On guitar, this chord uses the fingering pattern shown above, where "X" means don't play that string and "O" means play the open string.
On piano, simply press the E, G#, B, D keys simultaneously. The visual diagram above highlights exactly which keys to press.