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Guitar Lesson - Chords in A
Chords and Theory
Chord naming - when you see a chord like A6, it means "an A chord, but with the sixth note in the major scale of A added".
The first chord is an A chord, but with a half -barre (flatten your first finger). Taking the top note (A) down one fret gives you A maj7, then A7, then A6.The numbers in chord names refer to intervals - the distance from the starting note, using the notes of the major scale.
So A to A is 8, A to G sharp is 7, A to F sharp is 6, etc. This rule works for all chords.
This pattern could be moved up the fretboard - for instance if all the chords were moved up 3 frets we'd be in the key of C, and the chords would then be C, Cmaj7, C7, C6.
Next the same idea is transferred to a root 5 shape - now it's the middle note (A) that's moving.
Then we have some common chords in this key (complete list is on the left hand column)
Chords in A
We can improvise in the key of A with the scale shown ( both in tab and as a fretboard map) It's also referred to as F sharp minor pentatonic, it's the same notes either way.
Then I've put in the flat 5 or blues notes, which works well for country/blues/rockabilly material. In practice, you can mix these two scales up any way you want.
Guitar tab - each string (of 6) is represented by a line, string 6 is at the bottom (low E) The numbers tell you the fret to play in, it's as simple as that. My other hub Guitar tab has more info.
Harmonised scale in A
If you look at the key signature for the key of A, the number of flats or sharps which is the first thing to appear on written, notated music - you'll notice there are 3 sharps.
On piano this would probably mean it's going to be a little difficult to play, but on guitar it doesn't make much difference - due to the fact that you can just move patterns up and down the neck to play in different keys.
In this key,
- The I, IV and V chords are A, D, E (often E7)
- The ii iii and vi chords are minor ( Bm, C♯m and F♯m)
All this material will work well together in terms of songwriting. A is a favourite key for The Beatles, country, country rock songs.