Diatonic Harmony

Hi,

The term diatonic means that the notes come from the same key.

Chords and notes that fall outside those made from these scales are not diatonic.

In the key of G major,the seven notes are– G, A, B, C, D, E, and F#.

A Cmaj7 is a diatonic chord in the key of G major since the notes are - C E G B which fall inside the G major scale.

A Cm7 is not a diatonic chord in the key of G major since the notes are - C Eb G Bb,
where Eb and Bb fall outside of the G major scale.

Hope this is clear.

Thanks

Dominant 7th

Hi,

Dominant 7th Chord is frequently used in many genres especially in Blues.








The above example is the pattern and notes for G dominant 7th chord.
All you need to do is study the fingering pattern and you can form other dominant chords easily.

Formula for Dom7th chord - 1 3 5 b7

G7 chord consist of G, B, D, F.

As for finger position you can try:
R (middle)
3 (index)
5 (last)
b7(middle)

Have fun.