Watch the Maj7 Chords online guitar lesson by Matthieu Brandt from Chord Cookbook
The chord formula for a major seventh chord is 1-3-5-7. The maj 7th chords have a romantic gentle character to them and they are mostly used in slower tempos to make that quality come out clearly. They are also used in jazz and Latin-American music and because these styles have influenced pop music, over the years songwriters who write in the pop & rock idiom have also started using them. The major seventh is the note that is 11 frets up from the root or if you wish 1 fret down.