Colonel Iain Scott takes it to the bridge this month with a look at different variations of 9th chords: major 9, dominant 9, minor 9. Get down!
Iain Scott provides another in-depth look at what makes chords tick. This month: 9ths.
Typically, chords are built from scales using stacked 3rd intervals (every other note). You make ‘7th’ chords from four ‘3rds’ in sequence (1-3-5-7). Add another 3rd interval to this sequence (1-3-5-7-9) and you produce 9th chords. So in the key of C major it goes like this: Cmaj9 is: C (root), E (3rd), G (5th), B (maj 7), D (9th). G9 is: G (root), B (3rd), D (5th), F A (9th). Dm9 is: D (root), F A (5th), C E (9th). You can also simply 'add' the 9th interval to a major triad to produce 'C add 9' or C(9). C add 9 is C (root), E (3rd), G (5th), D (9th). These chords are commonly found in funk, gospel and R&B.