Down For Double (Bb major) - Jazz Analysis & Chords

Chord Distribution Analysis

No obvious ii-V patterns detected.

Harmonic Highlights

• Employs a cyclical I-VI7-II7-V7 progression in Bb major, utilizing secondary dominants (G7, C7) to drive the forward motion characteristic of Kansas City swing.
• The structure functions as a “Rhythm Changes” derivative, replacing the diatonic minor vi and ii chords with dominant counterparts to create a brighter, more aggressive harmonic pull.
• The bridge transition utilizes a V/IV (Bb7) to resolve into the subdominant (Eb6), followed by a prolonged C7 to F7 sequence that reinforces the primary V7 via a secondary dominant (V/V).

Improvisation Focus Bb Major Blues scale combined with chord-tone targeting to navigate the rapid secondary dominant shifts.

Difficulty Rating 2/5 — The predictable cycle of fifths and standard diatonic framework are accessible, though the typical high-swing tempo requires significant rhythmic precision.