A Suspended 4th
Asus4 is made of 3 notes: A, D and E. Here it is in root position, with A at the bottom.
Inside Notley Piano: all the inversions of Asus4, fingering for both hands, a play button, and practice that helps you remember it.
| Note | Degree | Interval from A |
|---|---|---|
| A | 1 | root |
| D | 4 | perfect 4th |
| E | 5 | perfect 5th |
A sus4 chord replaces the 3rd with a perfect 4th. It sounds tense and unresolved, and it usually resolves back down to the major chord.