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Garage Band Theory

For the musician in you or the musician in your life!


combines the freedom of playing by ear

and the strength of traditional music theory.

“For less than the price of a single lesson

Garage Band theory delivers a lifetime of learning.”


what artists have to say

  • "Quite simply, this is the most comprehensive book on music theory I've ever seen."


    - Bill Payne - Little Feat

  • "Garage Band Theory is a must for any musician."


    - Rodney Crowell - 2 time Grammy winner

  • "Something for every musician at any level."


    - Sam Bush - 3 time Grammy winner - International Bluegrass Music Hall of Fame

  • "Garage Band Theory is a veritable encyclopedia of useful tools and tips."


    - Alasdair Fraser - Scotland's premier fiddle ambassador

  • "This book is written in the people’s key."


    - Kostas - Nashville Songwriter Hall of Fame

A brief introduction to Garage Band Theory.

“Duke breaks it down so that anyone

can have a great grasp of music theory

and how to play by ear.”


Who knew music theory could be this much fun?

"This book is comprehensive,

but is set in the language of every day people."