As a final example, lets now assume you want to play an A seventh (A7) chord. This is where some guitarists get confused especially with other band members who have no idea of music theory and just know a few chords as 7th chords. So lets get this part straight here. There are basically 3 types of 7th chords which are all completely different. These chords are : * Major 7th Chords (written as maj 7) (chord formula: 1 - 3 - 5 - 7) * Minor 7th Chords (written as m7) (chord formula: 1 - b3 - 5 - b7) * Dominant 7th Chords (written as 7) (chord formula: 1 - 3 - 5 - b7)
So the A dominant 7th chord has the formula 1 - 3 - 5 - b7 Lets refer back to the A major diatonic scale again....
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