What key is Moment's Notice in?

Coltrane's composition moves through a rapid succession of ii-V-I cycles in multiple keys, demanding instantaneous mode shifts between Dorian, Mixolydian, and Bebop Major. The relentless harmonic movement leaves no room for tonal ambiguity — every two bars the tonal center shifts. Mastering this tune builds the kind of harmonic reflexes that define advanced bebop playing.

Moment's Notice in La#

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 B to E (ascending perfect fourth), E to C (descending major third), C to F (ascending perfect fourth), F to A# (ascending perfect fourth), A# to D# (ascending perfect fourth), D# to G# (ascending perfect fourth), G# to A (ascending half step), A to D (ascending perfect fourth), D to A# (descending major third), A# to D# (ascending perfect fourth), D# to G# (ascending perfect fourth), G# to G (descending half step), G to F (descending whole step), F to A# (ascending perfect fourth), A# to D# (ascending perfect fourth), D# to D (descending half step), D to G (ascending perfect fourth), G to C# (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 C# 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 · 44 bars · Form: AABA

Chords: Sim7, Mi7, Dom7, Fa7, La♯Maj7, Re♯m7, Sol♯7, Lam7, Re7, La♯m7, Re♯7, Sol♯Maj7, Solm7, Fam7, La♯7, Re♯Maj7, Rem7, Sol7, Do♯Maj7.

Scales for Improvisation La# dorian, La# mixolydian, La# major, La# bebop major, La# major pentatonic.

Moment's Notice in La#

Chord Diagrams — Moment's Notice in La# (Guitar)