La 12 Bar Blues
I – I – I – I – IV – IV – I – I – V – IV – I – V progression in La major
La 12 Bar Blues — I – I – I – I – IV – IV – I – I – V – IV – I – V
The A 12-bar blues (A – A – A – A – D – D – A – A – E – D – A – E) is the bedrock of blues, rock, and jazz — twelve bars, three chords, infinite expression. Combine the Minor Blues scale with Major Pentatonic for the classic note-bending vocabulary that defines the genre. Mixolydian fills in the gaps between pentatonic positions with diatonic color. With dominant seventh voicings (AMaj7 – AMaj7 – AMaj7 – AMaj7 – DMaj7 – DMaj7 – AMaj7 – AMaj7 – E7 – DMaj7 – AMaj7 – E7), the raw blues character comes fully alive.
Playing in La major
A major is a rock and blues cornerstone. The open A string delivers a strong root, while both E strings ring as the fifth. Classic A-D-E progressions practically play themselves with open cowboy chords. The open high E is the fifth, reinforcing power. A is a beginner-level key on guitar because the open A string is the root and the open E strings provide the fifth above and below, creating a massive low-end anchor. Beginners will find this key approachable since most chords use open voicings with minimal stretching.
Voice Leading
The bass line moves through A to A (ascending unison), A to A (ascending unison), A to A (ascending unison), A to D (ascending perfect fourth), D to D (ascending unison), D to A (descending perfect fourth), A to A (ascending unison), A to E (descending perfect fourth), E to D (descending whole step), D to A (descending perfect fourth), A to E (descending perfect fourth). The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from E to A by perfect fourth.
Capo Transposition
To play in A using familiar open chords: capo 2 with open G shapes; capo 5 with open E shapes; capo 7 with open D shapes. Choose the capo position that gives you the voicings you prefer — lower capo positions produce a fuller sound, while higher positions create a brighter, mandolin-like timbre.
Scales for Soloing
A major pentatonic works because every note is either a chord tone or a safe passing tone — there are no avoid notes. For soloing, this means you can play freely without clashing. Over dominant seventh chords, A Mixolydian adds the flat seventh for an authentic blues-rock edge.
Strumming Pattern
Use a shuffle pattern: D-u-D-u with swung eighth notes at 80-120 BPM. The triplet feel is essential — think of each beat divided into three, skipping the middle note. Add palm muting on the bass strings for a tighter groove.