F Half Whole Diminished on Guitar

F Half Whole Diminished runs 8 notes to the octave. Below it is mapped onto this instrument's E–A–D–G–B–E fretboard with every F marked, because what a player needs mid-number is not the pattern but where the root is when the harmony moves under it.

Tense, symmetrical, and slightly sinister — alternating half and whole steps pack in the b9, #9, #11, and 13, so it sounds like a dominant chord stretched to breaking point. Edgy, jazzy, and restless.

Heard in: Jazz lines over 13b9 dominant chords, fusion, film-noir and horror scoring — the sound of a V chord that refuses to settle.

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 F major or minor and let the written line pick its own notes out of it.