Major Scale Diatonic 7th Chords Each major scale contains 7 diatonic 7th chords. They are used to create common progressions such as major 251s and 1625 turnarounds. Major Scale Diatonic 7th Chords File Type: pdf Join PianoGroove Pro to access all downloads and learning resources. Download theory supplements, midi files, chord changes and full note-for-note transcriptions of every lesson. Learn more about pro membership >> Download