ISBN 9781610656290. The Chord Melody Method for Accordion is a breakthrough course that will teach you to quickly learn all of the chords used in today's music and to apply their harmonic applications professionally to any lead sheet. Imagine possessing the ability to develop and compose a professional-sounding arrangement on the spot while improvising confidently as needed! The average dedicated student will become proficient in 6 to 12 months and will experience a dramatic improvement in all areas of musicianship.

Traditional song that is usually played in Gypsy Jazz style - Jazz Manouche).
I have arranged the melody and created 3 improvisation choruses on the chord change.

D7 chord with Ab (G#) bass replace the Ab7 chord (tritone substitution).
Intermediate-Advanced level.
You can play and it sounds good too with the violin