Decoder: Circle of Fifths for Guitar Noisy Clan

Visualise Music Theory Instantly

Understand the relationships between keys, chords, notes and scales with a hands-on take on the classic Circle of Fifths. Suitable for any instrument, the Decoder makes music theory easier to understand and apply in real playing situations.

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Built for Learning Anywhere

Lightweight, durable and complete with a built-in stand, the Decoder is ready for every practice session. Whether you're exploring songwriting, improvisation or simply building your theory knowledge, it's designed to keep essential concepts within easy reach.

Loved by Musicians

See why musicians of all levels choose Noisy Clan to make learning, practising and playing music simpler, clearer and more enjoyable.

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FAQs

Please read our FAQs page to find out more.

Is the text large and easy to read?

The wheel uses high-contrast black text on yellow. It is still a compact, information-dense reference, so review the product images and listed size if you need especially large print.

Does it include a printed instruction manual?

A free downloadable eBook is included rather than a printed manual. Download access requires a compatible device and internet connection.

What instruments can I use this with?

The Decoder is designed for musicians across multiple instruments, including guitar, piano, ukulele, bass, violin, saxophone, and more.

What is the wheel made from?

It is made from plastic, not metal or card. The product has a 30-day warranty if it arrives misassembled or damaged.

Does it have a stand?

Yes, it features a built-in stand that snaps together on the back so you can have it upright on a table or music stand.

Can this help me write songs?

Yes. It helps you explore compatible chords and discover progressions that naturally work together for smoother song transitions.

Is this a complete music-theory course?

No. It is a hands-on visual decoder and quick reference. Beginners can use it to explore keys, scales, and chords, but may need the downloadable guide or separate instruction for deeper explanations.

Does it show both major and minor chords?

Simply rotate the wheel until your desired key appears in the center window, and you can see the scale notes and key signature.Yes, the chord zone dividers clearly separate major chords in the top section and minor chords in the bottom section.

How do I find the notes for a specific scale?

Simply rotate the wheel until your desired key appears in the center window, and you can see the scale notes and key signature.

How large is it, and will it fit in an instrument bag?

The wheel is listed as approximately 150 x 150 mm (5.9 x 5.9 in), while the packaged size is about 19.3 x 19.3 cm (7.6 x 7.6 in). Check your case or bag dimensions before purchase.

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