D Half Whole Diminished — Chicago Tuning Banjo

D Half Whole Diminished is 8 notes to the octave (symmetric family), drawn here across the Chicago Tuning Banjo's DGBE strings with every D marked, so home stays visible from anywhere in the pattern.

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.

Because these four strings are the guitar's top four, patterns a guitarist already owns land here unchanged. The work is rhythmic rather than geographical: making the pick articulate every note the head refuses to sustain.

Run it against a click at a tempo where every note gets the same weight. On a banjo an uneven scale is audible immediately — the instrument gives you no sustain to hide behind.