Piano Fills With G Locrian

G Locrian runs 7 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.

The most dissonant, unstable mode — the tonic chord is diminished (b5), making a true Locrian tonal center rare. Used for color and passing harmony.

Heard in: Metal riffs, jazz (half-diminished ø7 chords in ii°7 – V – i), horror and tension film scores.

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 G and let the melody choose which notes the fill keeps.