B Dominant 7th
B7 is made of 4 notes: B, D#, F# and A. Here it is in root position, with B at the bottom.
Inside Notley Piano: all the inversions of B7, fingering for both hands, a play button, and practice that helps you remember it.
| Note | Degree | Interval from B |
|---|---|---|
| B | 1 | root |
| D# | 3 | major 3rd |
| F# | 5 | perfect 5th |
| A | b7 | minor 7th |
A dominant 7th chord adds a minor 7th on top of a major chord. It sounds bluesy and restless, and it pulls strongly back to the chord a 5th below. It is the backbone of the 12-bar blues.