Join over 200K subscribers learning the fast, easy & fun way to make music. Taught by Ray Harmony, a multi award-winning college lecturer who's made music with multiplatinum Grammy-winning artists, and his protégé wife, Kate.

Free Book

join our list + get free book


Music theory is simple.

If it confuses you, then you've had a bad teacher!

Read this in 30 minutes and learn from a good one.


The most brilliant, fast, easy, and fun music theory book I’ve ever seen!
–DEREK SIVERS, CD Baby founder, TED speaker, musician, author of Anything You Want

It’s educational. It’s entertaining. Who could ask for more? Ray, the brilliant tattooed man, knows his onions!
–NEIL COWLEY, composer, pianist, session player on Adele's album 21 (most notably Rolling in the Deep)
Ray has a unique approach of hacking music theory, which gives you the essentials in a fraction of the time.
–VESPERS, Warp Academy founder, music producer

Hack Music Theory should be used in every school that teaches music theory – bar none.
–MARK MYNETT, PhD, Senior Lecturer in Music Technology & Production at the University Of Huddersfield UK, author of Metal Music Manual

If you have been put off music theory in the past, then this is the book to inspire and empower you.
–VICTORIA WILLIAMSON, PhD, Vice Chancellor’s Fellow Researcher & Lecturer in Music at the University of Sheffield UK, author of You Are the Music