How it works: FFT analysis finds the pitch classes present in your strum. The detector matches against 20+ chord types (triads, 7ths, sus, add9, 6ths, and extended chords), figures out which keys contain your chord, then pulls from a library of named progressions — the Royal Road, the Creep shift, the Andalusian descent, backdoor cadences, tritone turnarounds, and more — that pass through the exact chord you played. Tap any suggested chord to see guitar fingerings (open shapes plus movable grips). Shuffle for fresh ideas.