La Tritone Substitution

La Tritone Substitution — ii – bII7 – I

In the A tritone substitution (Bm – A# – A), the dominant V7 is replaced by a chord a tritone away — sharing the same guide tones but approaching the I from a half-step above. Lydian Dominant fits the substitute chord perfectly, while Dorian covers the ii. Bebop Major outlines the resolution. With seventh voicings (Bm7 – A#7 – AMaj7), the chromatic voice-leading creates the sophisticated sound central to bebop harmony.

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 B to A# (descending half step), A# to A (descending half step). A half-step bass movement creates a strong leading-tone pull that demands resolution. The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from A to B by whole step.

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 Freddie Green-style comping: short, muted chord stabs on beats 2 and 4 at 120-160 BPM. Keep the chords tight and percussive, lifting your fretting hand slightly after each attack to control sustain.