Tú Mi Delirio in A#

Tú Mi Delirio in A#

César Portillo de la Luz escribió 'Tú Mi Delirio' en 1954, una de las obras más refinadas del filin cubano. 'Tú eres la razón de mi existir' con la elegancia armónica del jazz cubano. Ibrahim Ferrer la grabó con el Buena Vista Social Club y la llevó a los escenarios internacionales. La cadencia IV menor (Cm en G mayor) —tan característica del bolero sofisticado— añade una sombra romántica perfecta.

Tú Mi Delirio in A#

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 A# (ascending unison), A# to C (ascending whole step), C to F (ascending perfect fourth), F to G (ascending whole step), G to D# (descending major third), D# to D# (ascending unison), D# to D (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 D to A# by major third.

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.