Guitar Theory Engine.
Compose, explore harmony and styles.
Turn the wheel and tap chords to build progression.
Fretboard Mini-Map
Under the hood
One engine. Infinite possibilities.
Parses everything
Jazz symbols (Δ7, ø), slash chords (Am7/E), tab shorthand, obscure extensions (9#11). Every notation system, one parser.
Generates any voicing
Guitar chord chart and voicing generator. Any chord, any tuning, any position. With real finger assignments, barre detection, and playability filtering.
Optimizes transitions
Smooth voice leading that minimizes hand movement. Shell voicings for jazz, open shapes for beginners.
Understands harmony
Key detection, scale harmonization, chord substitutions, reharmonization. Roman numeral analysis for any key, any mode.
Guitar-native
Standard, Drop D, Open G, DADGAD, and alternate tunings. Capo chart and optimization. Built around the guitar.
Instant & deterministic
No waiting for a model to think. Same input, same answer, real-time computation.