Welcome to Guitaru.com

Welcome to the deepest, most comprehensive guitar school on the Internet. This extraordinary educational content is created and curated by Berklee College of Music graduate, 30 year veteran teacher and author Karl Aranjo. Our mission is to spread the joy of music and playing guitar. And it’s free!

It’s not a riff compendium, a celebrity showcase, or brief instructional vignettes. These complete courses are multimedia, interactive, music education experiences you can access anywhere, anytime. It’s a unique opportunity to gain world-class training online for those with a desire to learn to play this beautiful instrument.

Courses & Guitar Lessons


1 Theory And Songwriting –Full Course

The essential and pro-level Music Theory, written specially for guitarists, and condensed into 21 easy to follow and understand interactive lessons. You will gain a high degree of musical literacy and leasrn how to write, analyze and understand chords, keys, scales, cadences, transposing, secondary dominants, substitute dominants and so much more. Superior to pricey courses offered at or through musical trade schools and colleges.  Full length multi-media guitar lessons and music theory instruction.

2 Pro Chords -Full Course         

A complete study in all the chords, chord voicings, chord tricks, theory, fingerings positioning and guitar lessons needed by today’s guitarist. In addition to exploring the mechanics and memorization of all essential chords, the uses and applications of these chords is discussed in great detail. As with all our courses, the interactive graphics, movies and sound files bring the material to life and are second to none.

3 Super Scales -Full Course            

To a large extent learning the guitar, and music in general, means learning to play and understand scales. A firm grasp of scale theory and practical applications of that theory is absolutely critical to your success as a musician. Our one of a kind scales course and guitar lessons have received rave reviews from teachers and students alike because it fun, informative and is full of unique and interesting exercises, concepts and techniques.

4 Big League Lead Guitar -Full Course     

This is a fresh and completely new approach to lead guitar playing and musical improvisation because we center our studies and guitar lessons on the art and craft of music making. This is not a “secret” picking method of the worlds’ shredders nor is it a listing of scales and speed exercises. This course teaches the solid principles of musicianship and improvisation once only available to those who had the time and money to attend a prestigious music school. If your studying to be a real musician, making music your own way, this is the lead guitar course for you!

5 Reading Rescue -Full Course      

This multi-media, no nonsense reading course is the sight reading study modern guitar teachers and students have only been dreaming about. Full of graphics, videos and play along animations this reading course will get you up and running in less time than you thought possible. Fun, informative and entertaining, this material is superior to the reading courses that big time music schools, with big time fees, have published on line.

6General Knowledge -Full Course        

A breif survey of key vocabulary, symbols, markings, indications and essential terminology.

7Beginners Course                 

All musicians need a solid course in the fundamentals and modern guitarists are no exception, the only problem is that virtually every beginning guitar book is exactly the same the next 1950’s era beginning guitar book -all the major publishers just rehash and republish Mel Bay volume 1. Our entry level material has been sold throughout the world for many years, is a guitar teachers dream and is the fast, fun and easy way to develop the guitar skills you need to be a player in today’s’ world.




“My first experience with the guitar was taking lessons from Karl Aranjo as a high school student. His lessons were more than just a collection of tips and riffs: they were a method. As I look through GuitarU.com, I get to take a trip back through those lessons and am reminded about I loved about them. His strong focus on the fundamentals quickly draws a connection between general music theory and the particulars of how that theory can be applied to the guitar, even allowing us as guitarists to use our instrument as an abacus-like tool to enhance our musical insight. In high school, Karl’s lessons got me up to speed to jam with my friends and in the school band almost immediately. In the almost 20 years since I left high school and had my last lesson with Karl, the things he taught me have continued to serve me well; I’ve played almost continuously in a variety of styles (jazz, rock, funk, folk), both as a hobby and as a part-time professional (currently playing with San Francisco’s Smash-Up Derby). If I hadn’t grown up in the same town as where Karl taught, I might have missed out on a lifetime of fun playing the guitar. With GuitarU.com, wherever you are, you can benefit from the same quality instruction that I had!

-Grahm Ruby

“Mr. Karl Aranjo is one great teacher to work with. When working with him, he is very flexible, and will teach you all the basics and fundamentals you will need while learning how to play the guitar. From learning basic chords to crazy licks and solo’s. You will become an expert in no time and looking like a professional guitar player. In my experience, I learned to master chord progressions much easier and understand it in a better perspective. In my music career/hobby, it has given me nothing but success to play in a band as a front man/rhythm guitarist, compose my own type of music, and as well as songs that I really wanted to learn how to play on the guitar. Learning through Karl Aranjo was a great experience and has helped me understand the guitar a lot easier, I would not have wanted this learning experience any other way.”

-Julius Isaac

“I had the pleasure of being a guitar student of Karl’s for several years. Karl advanced my playing ability a great deal very quickly by giving me a perfect combination of guitar technique, theory and assigning songs that motivated me to continue learning. I highly recommend Karl for all level of guitar players no matter if you are a beginner or advanced.”

-Tom Hunt

”Karl Aranjo is a great and experienced teacher with an extensive knowledge of guitar playing and theory. His thorough online course, GuitarU.com covers the whole spectrum from the first time beginner to advanced.”

Blake Aaron- Internationally Known Recording Artist

”Karl helped me dive into the blues when I was first starting out, and learning how to improvise opened up many doors for me on guitar. He has a vast knowledge ranging many musical styles, and i would recommend him to anyone trying to learn the instrument!”

Eric Cannata Young The Giant