What key is Indestructible in?

A# (Bb) major requires barre chords rooted at fret 1 on the A string or fret 6 on the E string. Despite the barre demands, it is a common key in funk, New Orleans R&B, and brass band music. The open D string can ring as the major third for added color. A# is a intermediate-level key on guitar because the open D string is the major 3rd of Bb, adding a bright color if allowed to ring. Expect to rely on barre chords throughout, which builds hand strength and unlocks the entire fretboard.

Voice Leading

The bass line moves through A# to C# (ascending minor third), C# to F# (ascending perfect fourth), F# to B (ascending perfect fourth), B to F# (descending perfect fourth), F# to B (ascending perfect fourth), B to D# (ascending major third), D# to D (descending half step), D to C# (descending half step), C# to C (descending half step), C to F (ascending perfect fourth), F to D# (descending whole step), D# to F (ascending whole step), F to A# (ascending perfect fourth), A# to D# (ascending perfect fourth), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to C# (ascending unison), C# to G (ascending tritone), G to C (ascending perfect fourth), C to D# (ascending minor third), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to F (ascending major third), F to G# (ascending minor third), G# to F (descending minor third), F to B (ascending tritone), B to A# (descending half step), A# to F (descending perfect fourth), F to D# (descending whole step), D# to F (ascending whole step), F to B (ascending tritone). 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 B to A# by half 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.

guaracha4/4 · 90 bars · Form: Intro-A-B-C-D-E-F-Coda

Chords: A♯m6, C♯9, F♯maj9, B7, F♯maj7, B9, D♯m6, D7♯9, C♯6, Cm7♭5, F6, D♯13♯11, Fm7♭5, A♯7, D♯m7, G♯7, C♯maj7, C♯m6, G7♯9, C7♯9, D♯m9, G♯9, C♯7, F7♭9, G♯, F, B9♯11, A♯m, F7, D♯m, F13, B13♯11.

Scales for Improvisation A# bebop minor, A# bebop.