The Chord Dictionary & Progression Builder

Browse every chord by root or by type — triads through 13ths, inversions, and a Scales & Modes view showing which chords live inside a given key.

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The Reverse Chord Dictionary & Progression Builder

Play a chord on your MIDI keyboard and it tells you what it's called — name, inversion, and the most plausible keys it belongs to. Needs a MIDI keyboard connected.

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Ladidah (Melodic Mode: Hum to Scale)

Hum or sing into your microphone and watch it transcribe into real notes — see them on a piano diagram and staff notation, then find out what scale you were actually singing.

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