• Transpose key with a turn of the wheel

    Change key effortlessly and transpose instantly with a turn of the Decoder’s wheel. The clear graphics visually separate major, minor and diminished chords.

  • Decode Music Theory

    Focus on one key at a time without information overload. It is an easy-to-digest, graphical representation of the structures in the music we hear daily.

  • Expose and Analyze Chord Progressions

    Check out the selection of 12 common chord progressions on the back to get you playing and applying your new Circle of Fifths knowledge. 

  • Compose your own songs

    More than a cheat sheet. It organises keys, chords, notes, and scales according to what they have in common and how good they sound together. 

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Other Versions of the Decoder: Circle of Fifths

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