Chord I, C major consists of the notes, C – E – G, while C major seventh consists of the notes, C – E – G – B. Chord ii, D minor consists of the notes, D – F – A. D minor seventh consists of the notes, D – F – A – C.

Scales #chordsFeatured snippet from the web The #chordscalesystem is a method of matching, from a list of possible chords, a list of possible scales. ... In contrast, in the chord-scale system, a different scale is used for each chord in the progression (for example Mixolydian scales on A, E, and D for chords A7, E7, and D7, respectively).