Functional Harmony Mapper

Enter a progression and map chord function through time. This tool labels Tonic (T), Subdominant (S), Dominant (D), and Pre-dominant, detects deceptive resolutions, and visualizes a live tension curve.

Key Root

Mode

Progression

Tonic (T) Subdominant (S) Pre-dominant Dominant (D)

Functional Labels

Click any chord card to visualize and play it with the shared piano helper.

Tension Curve

Higher values indicate stronger forward harmonic pressure.