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7th Chords - 4 Types

  •  10 August 2016
  •  994

There are four types of 7th chords:

  • Major 7th
  • minor 7th
  • Dominant 7th
  • minor Major 7th

Chords are made up of the 1,3,5 formula, so using the C Major scale...

Starting from C: C,E,G,B = 1, 3, 5, 7.

Starting from G: G,B,D,F = 1, 3, 5, b7.

Starting from A: A,C,E,G = 1, b3, 5, b7.

So there are 2 variables: the 3/b3 and the 7/b7.

  • A 3 can have a 7
  • A 3 can have a b7
  • A b3 can have a 7
  • A b3 can have a b7

No more combinations available*.

  • Major 7 (M7) = 1,3,5,7
  • minor 7 (m7) = 1,b3,5,b7
  • Dominant 7 (7) = 1,3,5,b7
  • minor Major 7 (mM7) = 1,b3,5,7**

*There are a few more, but they involve changing the 5th, too (Dimished 7th and half Diminished). They are reserved for a different lesson file…

**The minor Major 7 (mM7) chord does not appear in the Major Scale. Instead you can find it in the Harmonic minor (1,2,b3,4,5,b6,7) and Melodic minor (1,2,b3,4,5,6,7) scales.