So far, we have talked about triad, which are a three-note chord well suited for rock, pop and folk music. We cannot afford diatomic note the seventh to create more complex sounding chords which are well suited for blues and Jazz. I am going to show this in the key of G. If we add the seventh to a G major triad using the notes of the G major scale, we got the first chord of the G, which is a G major seven chord.
The second chord in the key of G would be an A minor seven chord. The third would be a B minor seven chord. The fourth chord C major seven. Fifth chord D7. Six chord E minor seven. Seventh chord would be F sharp minor seven flat five. We are back to the first chord G major seven. So, these are all diatomic seventh chords in the key of G. Once again G major seven, A minor seven, B minor seven, C major seven, D7, E minor seven, F sharp minor seven flat five, back to G major seven.
Now, musicians always talk about number so about a one six two four in the key of G first chord G major seven. Six chord E minor seven. Two chord A minor seven, four chord C major seven. And then, if someone said, "All right, why not take a solo over those chords?" You can use all of the notes from the G major scale because those chords were derived from the notes of G major scales. So, every note from the scale it is got to sound good.
Now, one thing that is important to remember is that triad also works. If we were to play that same chord progression using more simple chords triad, it will sound like this. The one chord G minor, the six chords E minor, the two chords A minor and the four chord C major.
So, neither one of those is more correct or better than the other one. It is just the matter of what is more appropriate for the song. If you want to create a more jazzy sound, use the seventh chord. If you want it to sound simpler, more primal use the triads. So, what you should remember from this chapter is the order of the diatomic seventh chord in the major scale. So, we have major seven, minor seven, minor seven, major seven, dominant seven, minor seven, minor seven flat five. Did you write that down? Write it down so you have it memorized. Major seven, minor seven, minor seven, major seven, dominant seven, minor seven, minor seven flat five. Those are all of the diatomic seventh chords from the major scale.
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