Practical Music Theory 101 For Guitar (Udemy.com)
Learn Basic Music Theory For Guitar And Master The Fretboard With Ease!
Created by: Henry Olsen
Last updated March 2019
What you will learn
- Learn the musical alphabet and how to master it the easy way and save years of frustration and confusion
- Learn to understand and build any chord with ease
- Play and understand intervals in any key flawlessly
- Learn secret formulas and shortcuts that will save you months of confusion
- Instantly master and visualise the entire fretboard
- Learn to build and locate triads and "triad islands" all over the neck
- Learn and understand all of the musical keys all over the neck with ease
- Understand relative major/minor keys and how to use them
- Learn sus2, sus4, 7th, minor 7th, 9th,11th, 13, diminished, augmented and many more types of chords
- Learn and understand chord inversions and effective ways of using them
- Master the major & minor scale in any key
- Learn how the notes from the major scale are used to build chords within a key
How it compares
Against the other 270 rated Udemy courses in Music on CourseDuck:
- Rating4.7 out of 5higher than 61% of them
- Reviews1,273#37 of 271 by number of reviews
- Length5.2 hourslonger than 65% of them
- Last updatedMarch 2019earlier than 85% of them
Course Description
Do you want to understand the fretboard?
Would you like to know how to build any chord?
How about being able to play in any key?
If you answered YES to these questions, then you're in the right place! My name is Henry Olsen, and I've been teaching guitar for eight years. I've taught thousands of students online and one-on-one, and have a 4.5 average rating after almost 3000 reviews on Udemy! Now it's time for me to show you basic, everyday, music theory and how it applies to the guitar. This course is full of practical, everyday examples and explanations that will turn YOU into a guitar wizard.
You will:
- Learn the musical alphabet and how to master it the easy way and save years of frustration and confusion
-Learn to understand and build any chord with ease
-Learn secret formulas and shortcuts that will save you months of confusion
-Play and understand intervals in any key flawlessly
-Instantly master and visualize the entire fretboard
-Learn to develop and locate triads and "triad islands" all over the neck
-Learn and understand all of the musical keys all over the neck with ease
-Understand relative major/minor keys and how to use them
-Learn sus2, sus4, 7th, minor 7th, 9th,11th, 13, diminished, augmented and many more types of chords
-Learn and understand chord inversions and effective ways of using them
-Master the major & minor scale in any key
-Learn how the notes from the major scale are used to build chords within a key
-Learn how to play and visualize the major & minor scale on any string
-Learn how intervals relate to chords and their color
The course also comes with "in-video" scales and charts, so it's easy to follow.
Of course, you also get all of the files as a downloadable PDF so that you can learn anytime and anywhere!
I've been testing and refining this course on real beta students for the past month, and their results have been off the charts! That's why I'm very confident that this course will be an incredible asset in your guitar journey.
Imagine the next time someone asks you to pick up the guitar at a family gathering and NOW you can play songs everyone knows and enjoys with ease and confidence. You'll be the star at the party, and everyone will love you for it! After you join this course, you won't need to imagine anymore. I take you step-by-step and note-by-note through all the elements necessary to make this a reality in a short amount of time!!!
The course also comes with a 42-page picture chord book, so you'll have an easy time following along with all the lessons.
This method has WORKED on thousands of students, and I know it will work for you!
Become the guitar player you've always dreamed of being and JOIN NOW!!!
You won't regret it!
Here are what some of my students have said in the past!
"Just amazing, Can't ask for more simple and easy step by step learning.
The good thing is I'm learning, and the instructor is proving to be the best. Glad
I found this course! Thank You, sir!"
"I have just completed this course and would comment accordingly.
Extremely well-constructed, laid out and balanced course, targeting all
the key areas of guitars and gear. The information and advice provided
by Henry Olsen gives the student a sound grounding and prepares
them for their journey ahead. I found the lectures most informative and
stimulating and has further invigorated me to explore some new aspects
of my playing too. Highly recommended, and I would urge anyone,
certainly a beginner, to work through this course. Thank you, Will."
See you inside!
Henry
Instructor Details
- 4.7 Rating
1,273 Reviews
Henry Olsen
Henry Olsen is a professional guitarist with 20 years of playing experience and 10 years of professional teaching experience. Henry provides one-on-one private guitar classes in Austria and offers online guitar courses – both free and paid – to students who sign up on his website. He also has a constantly expanding YouTube Channel with over 17000 subscribers.
Henry is a teacher proud of sharing his expertise, and knowledge and he has thousands of teaching hours to his credit. He has trained 100.000+ students to date and has consistently gotten 5-star reviews for his work. He currently teaches 14 guitar courses (all available on Udemy)
Henry was born and raised in San Francisco where he lived his early childhood years. He later moved to Croatia where he spent his teenage years. Henry currently lives in Austria with his family of three; a beautiful wife and two adorable sons.
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Reviews
By Emil Niec on 1/15/2026
I started learning guitar year ago,and went through 4 private teachers who charged 50$ and hour,2 schools and 2 online courses. The problem was that they all want you to play guitar, without first understanding the instrument. I find Henry's cours very structured, simple to understand and intuitive, I've seen some 2 stars reviews of this cours saying the lessons are good,I just can't learn guitar, this is not fair to rate the cours, because it is not the problem, the problem is the individual. This cours is 100% gor beginners and if you do uour do diligence you will 100% succeed.
By Laur Hagan on 5/27/2025
Lot of information presented.. I want to play guitar just for myself, so a lot to take in. But I am glad I took this course because now I have an understanding of the structure of chord shapes, the difference in playing my more familiar country to blues and jazz. I now appreciate the harmony and the skills of skilled musicians. And I can also apply some of what has been taught in this course to the more elementary skill I want to achieve. Better to understand the structure behind chords than just trying to remember them.
By Dieter Haug on 6/28/2024
Really eye-opening, it's ocassionally a bit difficult to follow, rewinding the video is almost mandatory, but it's very well explained and you get a real understanding of Scales, how to build Chords out of them and how to know which Chords harmonize. Also it is good that Henry encourages to extensively practice first yourself before continuing the course, because there is a lot to take in and a lot of information condensed in a 5 hour course. Highly recommended if you want to get deep into guitar play. For total beginners his Basic course is more suitable, this one might overwhelm you very quick.
By Gyula Soos on 6/10/2023
I watched many courses before, but using triads and triad islands to get to know the fretboard and building previously hard-to-understand chords was a revelation. Of course, memorization is involved until this whole knowledge becomes part of a "finger memory," but at least the lessons are part of a progressively complex system. I learned more here than in many other courses combined.
By David White on 10/28/2022
This course really helped me to understand the relationships among the harmonized scale, triads, chord variations, and inversions. It has also given me cause to look at chords and the fretboard in an entirely new and informed perspective - no more playing chords by rote memorization. Looking forward to using this information to expand my knowledge of music theory for guitar. Thanks!
By Nikhil Hebbar on 10/27/2021
I've been playing the guitar for close to a decade now, but never bothered to learn the theory behind all of it. Thanks to Henry now I feel I understand the things I play much more deeply. It has opened up a lot of ideas for me, and has demystified the guitar fretboard. Henry is a great teacher. He has the ability to put himself in his students' shoes, and help you figure out your problems before you even know it! Great course, highly recommended for all guitar players. Thank you Henry! :)
By Shashikiran Jeppu on 4/27/2021
Henry is such a down to earth and a honest teacher. He knows really well the struggle it takes to learn the theory and to put that in to action. I have enrolled for several courses, guitar and non guitar ones on Udemy and this is the first one i ever completed. Henry has explained the course very well. I realised watching a lecture multiple times, pausing it /trying/ copying Henry really helps understand what he is trying to explain. First time ever in a decade I have been able to sustain my interest in playing guitar for this long. waiting for more courses from Henry. Thank you Henry. You are a really good teacher.
By Tony Arsenio on 2/9/2021
complete beginner- like sect 1, 2. Henry explained really well. Only mid of sect 3 and whole sect 4 & 5 i sort of lost. need to slow down/ break down into details of concept-maybe variations could be introduce later once the basics are understood. Overall - good course for complete novice to get idea what music theory is and chords. Learn a lot from sect 1 & 2. Thanks Henry.
By Henrý Þór Baldursson on 3/25/2020
It's a great course The first part really got me thinking about intervals and such. I feel like some more time could have been used up on suspended chords, 7th chords, and other added notes. It's there but I felt I needed to go back a couple of times. Another suggestion would be to spend some time on different scale shapes (root note on different strings) as I feel it helps with playing leads while strumming chords and leading up to a chord if that makes sense.
By Charle Boreham on 7/6/2019
Very good course. I've only been playing for 8 months and I this course taught me an amazing amount of guitar theory (chord construction, triads, scales etc). It was definitely not always easy but Henry explained it as well as he possibly could. I'll have to refer back to the course as I'm progressing with my guitar playing and I'm sure that is when things will start sticking!
Quality Score
No CourseDuck member has rated this course yet. Taken it? Give each part a thumbs up or down.
Overall Score : 94 / 100










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