La# Ascending Augmented
I – I+ – I6 – I7 progression in La# major
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La# Ascending Augmented — I – I+ – I6 – I7
The A# Ascending Augmented progression (A# – Bbaug – Bb6 – Bb7) is a line-cliché technique: the bass holds the tonic while an inner voice climbs I–aug–vi, creating yearning tension that demands resolution. The Whole Tone scale fits the augmented chord precisely; Major and Mixolydian cover the surrounding diatonic chords. Augmented harmony appears in both jazz ballads and classic pop introductions for good reason. With seventh voicings (A#Maj7 – Bbaug – Bb6 – Bb7), the chromatic ascent gains full harmonic richness.
Playing in La# major
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 Bb (ascending unison), Bb to Bb (ascending unison), Bb to Bb (ascending unison). The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from Bb to A# by unison.
Capo Transposition
To play in A# using familiar open chords: capo 1 with open A shapes; capo 3 with open G shapes; capo 6 with open E 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 D-DU-UDU at 100-120 BPM for a standard pop strum. Accent beats 2 and 4 for a backbeat feel. Vary dynamics between verse (lighter) and chorus (stronger) to build energy.