Type a chord progression — real symbols, the kind on a lead sheet
(Dm7 G7b9 Cmaj7, slash basses like C/E work too) — and turn
it into a playing texture: classic arpeggio patterns (up, down, up-down,
Alberti bass) or strummed blocks, through real jazz voicings (shell,
rootless, drop-2) borrowed from the theory pages. One chord per bar, looped. The chord tones
themselves are the pitch lock — this is the roadmap's lowest-effort generator because the
theory engine already knew the notes.