Guitar chords in the key of A:
Chord A9-5 (11th fret) notes: A, C#, G, B and Eb. You should not play the 6th string.
This chord is played by placing a barre on fret eleven with your index finger.
A dominant 9th b5 guitar chord's alternative names: A7(b5,9), A9b5.
1(A), 3(C#/Db), b5(D#/Eb), b7(G), 9(B).