Piano Fills With A# Mixolydian Bebop

A# Mixolydian Bebop runs 8 notes to the octave. Below it is lit across two octaves of this chair's keyboard with every key numbered by degree, because what a fill needs mid-song is not the run — it is which degree the right hand is sitting on when the chord changes under it.

Mixolydian with a passing major 7th between the b7 and the octave — the bright, bluesy dominant sound with a chromatic slide that keeps every chord tone on a downbeat. Slick, swinging, and quintessentially bebop.

Heard in: Jazz lines over dominant seventh chords, blues changes, and rhythm changes — the workhorse bebop scale.

A piano fill lives in the right hand over a left hand that never stops comping, so the scale is read two ways at once — which notes sing over the held chord, and which ones walk the song into its turnaround.

Work it over a held left-hand chord until the right hand stops thinking about the order, then take it to a song in A# and let the melody choose which notes the fill keeps.