Decoder: Circle of Fifths

An interactive spin on the classic circle of fifths.

Most circle of fifths are confusing and cluttered. Decoder let's you play as your learn without information overload.

Decoder helps make music theory easier by offering an easy-to-digest, graphical representation of the structures in the music. It quickly organises keys, chords, notes, and scales according to what they have in common.

  • decoder spinning wheel

    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

  • learning the circle of fifths

    Decode Music Theory

    With Decoder, 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.

  • decoder guitar theory

    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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learning guitar

Simplify music theory so you can focus on PLAYING

We even added in a little extra - the Quick Chords, reminders under every window to build triads for each chord without having to turn the wheel. Plus, a selection of 12 common chord progressions on the back. This way, you can see how chords are built up from the notes. Helping you get playing and applying your new circle of fifths knowledge.

Give it a spin! Try our Digital Decoder: Circle of Fifths

Use Digital Decoder