D Whole Half Diminished, Guitar Side

8 notes to the octave, mapped below onto this reader's EADGBE fretboard, with every D called out. Those markers are the useful part mid-bar: a chart moves under you, and the thing you need is where the root went — not where the pattern started.

Unstable and eerie — alternating whole and half steps, with the b3, b5, and 6 spelling a diminished seventh chord in every direction. Ominous, symmetrical, and unresolved.

Heard in: Diminished seventh chords in classical and jazz, horror and suspense scores, Bartok and Stravinsky, and neoclassical metal.

A chart names the chords and says nothing whatever about the notes between them, so everything a guitarist plays that is not a written chord comes out of a scale that the numbers only imply.

Play it slowly against the audio until the shape stops being a shape, then take it to a chart counted in D and let the numbers pick their own notes out of it.