Mapa de Acordes, an orbiting map of harmony

Field notes

Chord entry accepts American and Latin symbols, with slash notation for the bass; the note picker also lets users choose each note’s octave and optionally supply a key context. The progression editor supports per-chord durations, rests, and three meters, while playback layers piano, harp, and pad with separate level controls. The page says its chord colors and descriptions are orientative and recommends listening to alternatives.