A 7sus2 (A7sus2)
Notes in A 7sus2
Inversions
Same notes as A 7sus2, with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
A in the bass
1st inversion
B in the bass (A7sus2/B)
2nd inversion
E in the bass (A7sus2/E)
3rd inversion
G in the bass (A7sus2/G)
Open voicings
A close-position chord like A 7sus2 can sound cluttered in the middle of the keyboard. Jazz players open it up by dropping one note down an octave, spreading the same notes wider without changing the chord.
Drop 2
E on the bottom
Drop 3
B on the bottom
A 7sus2 consists of A, B, E and G, played at the same time.
The sus2 cousin of 7sus4: the third is replaced by a major second, with a minor seventh underneath. It sounds more open and floating than a normal dominant seventh, and it resolves nicely down to the plain seventh when you want a little movement in a groove.