Figure 1
shows the naturally
occuring seventh chords within the C major scale. These can be
created by taking triads and stacking another third on top, all the
notes of which come directly out of the C major
scale.
Fig. 2
I Ma7 ii mi7 iii mi7 IVMa7 V7 vi mi7 vii mi7[b5]
Figure 2
shows the chord
qualities of each naturally occuring seventh chord within any major
scale. The chord quality is determined by the intervals that make up
the chord.