Cadence Ladder
Real-time key estimation · Roman-numeral functional labeling · cadence detection. Harmony made visible — watch tension build and resolve.
Dominant
V vii°
Subdom.
IV ii
Tonic
I vi iii
Press Begin — a known progression plays and the ladder proves itself. Connect a MIDI keyboard to play your own chords.
━ Authentic cadence V→I━ Plagal IV→I━ Deceptive V→vi
Current key
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Active chord
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Cadence
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No MIDI detected — internal demo playing
Read the design notes ↗