Fools Rush In in A

Johnny Mercer / Rube Bloom(1940)swing

Fools Rush In in A

Key of A

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 E (ascending perfect fourth), E to C# (descending minor third), C# to F# (ascending perfect fourth), F# to A (ascending minor third), A to F# (descending minor third), F# to B (ascending perfect fourth), B to B (ascending unison), B to B (ascending unison), B to G (descending major third), G to F# (descending half step), F# to D (descending major third), D to C# (descending half step), C# to A (descending major third). A half-step bass movement creates a strong leading-tone pull that demands resolution. The root motion by larger intervals (fourths and fifths) gives each chord change a strong, decisive character. When the progression loops, the bass returns from A to B by whole step.

Scales for Improvisation

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.

swing4/4 · 32 bars · Form: A

Chords: Bm7, E7, C♯m7, F♯m7, AMaj7, F♯m, Bm, B7, B7♭5, G7, F♯7, Dm6, C♯m, A.

Scales for Improvisation A bebop, A bebop major.

Diatonic chords: See all chords in the key of A