G Locrian on Guitar

G Locrian runs 7 notes to the octave. Below it is mapped onto this instrument's E–A–D–G–B–E fretboard with every G marked, because what a player needs mid-number is not the pattern but where the root is when the harmony moves 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.

Scale work in the armonía is for the passing figure that joins one chord to the next — a few notes at the seam of a change, played by one member while the other keeps the pattern intact.

Take it slowly against the playback until the geometry stops being geometry, then put it under a number in G minor and let the written line pick its own notes out of it.