Music Theory Circle of Fifths

This Music Theory Circle of Fifths Wheel makes music theory something you can turn, see and use. The sturdy physical decoder is paired with a 36-page instructional booklet, giving musicians a screen-free way to explore chords, scales, intervals, key relationships and progressions.

Whether you are learning the basics, teaching a student, planning a song or changing key for a singer, the wheel turns a theory calculation into a clear visual step. It is designed for musicians across instruments, including guitar, piano, bass, ukulele and harmonica.

Why You'll Love It

• Decode keys visually — Turn the wheel to reveal the chords and intervals connected to the key you choose.
• Transpose without guesswork — Move to a new key and see its relationships immediately.
• Find progression ideas — Use compatible chords as a practical starting point for songwriting and composition.
• Learn away from a screen — The physical wheel and printed booklet work offline; optional video guides are available separately through a QR code.
• Teach with something tangible — The visual format gives teachers and students a shared way to discuss scales, triads and intervals.
• Carry theory with your instrument — The compact format fits in a gig bag pocket or piano bench.

How to Use It

1. Choose the key you are learning, playing or moving into.
2. Rotate the decoder until the key appears in the correct position.
3. Read the corresponding chords, scale relationships and intervals shown by the wheel.
4. Use the booklet for explanation, then apply the result to practice, teaching, songwriting or performance.

What You'll Learn / Explore

Build a working understanding of the circle of fifths, scales, intervals, relative relationships, triads, compatible chords and transposition. The booklet is focused on accessible foundations and practical use rather than college-level theory depth.

A Complete Learning Set

The decoder handles fast visual reference, while the booklet introduces the ideas behind the layout and shows how they connect to real musical situations.

Who It's For

- Beginners and visual learners
- Intermediate and experienced musicians needing a refresher
- Music teachers and students
- Songwriters and composers
- Performers who transpose music
- Players across multiple instruments

Great For

- Music-theory study
- Songwriting and composition
- Transposing for singers or bands
- Lessons and classroom demonstrations
- Keeping in a gig bag or piano bench

Turn the theory into a musical choice, then get back to making music.