The twelve-key pattern, the note names, and whole & half steps — taught on the piano keyboard, where music theory is easiest to see. This single chapter is the foundation everything else is built on.
Music Theory Simplified · Demystifying the language of music
Finally understand music theory.
Stop guessing.
Most people memorize songs. Very few understand why they work.
This is the visual system that turns music theory from random into obvious — so you can write songs, improvise intentionally, play by ear, and finally understand what you're playing. Taught on the keyboard, it applies to every instrument. No prior theory required.
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The uncomfortable truth
Most people memorize songs.
Very few understand music.
You can play a few songs. Maybe some chords you found online. But you can't explain why any of it works — and that's the wall that stops most self-taught musicians from ever becoming truly musical.
What you have now
Memorized shapes.
You can play songs. You remember chord shapes. You know a few scales. But if someone asks you to play in a different key, you freeze — because you don't know why the shapes work.
- Can't transpose to a new key
- Can't write your own progressions
- Can't follow what other musicians say
What you get
The language behind them.
Once you see why a chord is built the way it is, the shapes stop being random. They become a vocabulary you can speak fluently — in any key, across the whole keyboard, in any musical situation.
- Move freely between any key
- Write progressions intentionally
- Speak the language of music
Read this before you blame yourself
Music theory wasn't hard.
The explanations were.
Most theory books were written by classically-trained pianists for conservatory students. They assumed you read sheet music. They used Italian terms. They asked you to memorize forty modes before you'd written a single song.
That format wasn't built for self-taught musicians and producers who learn by seeing, hearing, and playing. The information wasn't wrong — the delivery was.
"I started in 2008 with a MIDI keyboard and FL Studio, no theory. From 2010 to 2015 I taught music production on YouTube as MellaMayne — but every theory book I opened was written for conservatory students, not self-taught producers. So I wrote the book I wish I'd had at the start: Music Theory Simplified — the whole language of music, explained visually on the piano."
— Melvin Tellier · Founder, Musiciangoods · Self-taught since 2008
"Theory clicks when you stop trying to memorize it
and start seeing it on the keyboard."
and start seeing it on the keyboard."
Most theory books teach this.
Drag to reveal a better way.
Drag the slider to see why 100,000+ musicians prefer Music Theory Simplified.
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VISUAL LEARNINGDiagrams, colors & keyboard visuals help you learn faster.
PRACTICAL FOCUSEvery concept connects directly to playing real music.
BUILT FOR BEGINNERSWritten for self-taught musicians. Zero prior theory required.
LEARN WITH CONFIDENCEFinally understand why music works and express yourself freely.
QR codes included
Stuck on a concept? Just scan and watch.
Every chapter includes QR codes printed right on the page. Open your phone's camera, scan the code, and instantly watch a short video tutorial where Melvin walks you through the concept in person.
No app, no login.
50+ video tutorials across all 7 chapters
Works on any phone — no app needed
Same videos work for PDF and paperback
Flip through the book
See exactly how the book teaches.
Explore real chapters and flip through actual pages from Music Theory Simplified.
1 / 5
Built for clarity. Designed for results.
Every chapter tells you
exactly where you're going.
No fluff. No wasted time. Each chapter is structured to help you learn faster, stay focused, and actually understand.
01
Skill Level
Know whether a chapter is beginner, intermediate, or advanced before you start.
02
Time Required
Most chapters take 1-3 hours, so you can learn at your own pace.
03
Clear Outcome
Every chapter starts by telling you what you’ll be able to do when finished.
12345604
What You’ll Learn
See exactly which concepts and skills the chapter will cover.
05
What You’ll Need
No surprises. Each chapter tells you exactly which tools you’ll use.
06
Skip If You Know This
Already familiar? Jump ahead and focus on what you don’t know.
A Complete Learning System.
Jargon guides. Visual cheat sheets. QR video lessons. Everything you need to finally understand music theory.
JARGON GUIDES7 jargon guides break down complex music terms — one at the end of every chapter.
VISUAL CHEAT SHEETSColor-coded reference pages including the full chord chart, modes map, and circle of fifths.
QR VIDEO LESSONSScan QR codes on key pages to watch step-by-step video explanations.
CHAPTER SUMMARIESKey takeaways at the end of all 7 chapters to review and lock in what you’ve learned.
What's inside the book
120 pages.
7 fundamental concepts. One connected system.
Every chapter builds on the last. Each one includes visual diagrams, a cheat sheet, a jargon guide, and a QR code linking to a video tutorial. Click any chapter to see what's inside.
01 The Piano Fundamentals
02 Composing: Keys & Scales
What a "key" actually is. The major scale, the natural minor scale, relative keys, and an intro to the musical modes — all visually mapped, plus a complete piano scales chart. The chapter that makes scales finally make sense.
03 Harmony: Guide to Chords
The biggest chapter in the book. Music intervals, every chord type, triads and seventh chords, all chord formulas, inversions and voicings — plus a full piano chords chart. The complete vocabulary of harmony.
04 Chord Progressions
Diatonic chords explained. Roman numerals, minor-key chords and scale degrees. The three legendary progressions — I-IV-V, I-V-vi-IV and IV-I-V-vi — the patterns behind most popular music, finally decoded.
05 Music Notation
Learn to read music. The clefs, note values, connected and dotted notes — the essentials of standard notation, explained simply and without the conservatory jargon.
06 Rhythm & Time
The musical heartbeat. The rhythm grid, strong and weak beats, and music meter — time signatures like 3/4, 4/4 and 2/4 — and how rhythm shapes everything from a ballad to a dance track.
07 The Circle of Fifths
The chapter that ties everything together. Key signatures, keys with sharps and flats, overlapping and relative keys, and our simplified circle of fifths — the single most useful diagram in music. By the end, you read music fluently.
The moment it clicks
Watch the keyboard go from random to obvious.
Toggle below to see the difference between how most beginners see the keyboard — and how you'll see it after the Harmony chapter.
Theory feels random.
You learn a chord. Then a scale. Then a key signature. Each feels like a separate rule to memorize. You forget which is which and stay stuck, forever guessing.
Dozens of unrelated rules to memorize one by one.
It's all one pattern.
Every chord is a Root + 3rd + 5th. Every key follows the same formula. Once you see how intervals connect on the keyboard, you can build any chord, in any key.
Dozens of rules become one system you apply everywhere.
Real readers · Real reviews
The book that finally made theory click
for thousands of self-taught musicians.
Liam H.
After 12 years, music theory finally makes sense.
I've owned at least seven theory books. Every single one assumed I could already read sheet music. This one starts where I actually am — looking at a keyboard, wondering why anything works. By the Harmony chapter I understood intervals for the first time in my life. The relief is hard to describe.
Chloe D.
Two weeks in and I'm writing my own progressions.
I used to write songs by stacking chords until something sounded okay. Now I actually choose chords on purpose because I understand what they'll do emotionally. The Chord Progressions chapter alone unlocked patterns I'd avoided for years.
Andre P.
I can finally play without freezing.
Someone calls a key, I used to panic and stick to the same few notes. Now I actually know what notes work and why. Started picking up songs by ear last month — something I thought I'd never be able to do. This book is the cheat code I wish I'd had a decade ago.
From Shopify · Judge.me verified
Real photos from real readers.
Understood the keyboard in 2 days.
I'm not exaggerating. The Harmony chapter broke down what every other book skipped.
10 years playing. Scales finally make sense.
The Keys & Scales chapter showed me scales as patterns instead of random notes. Mind blown.
Best gift I've ever given my son.
Three weeks later he's writing his own songs and explaining theory to me. The QR videos are gold.
Wrote a full song in one weekend.
The Chord Progressions chapter and the Roman numerals system is pure gold. Bought the mousepad too.
Bridged my ear and the theory in a weekend.
As a producer who only knew the piano roll, this book finally connected the sounds to the theory.
The QR videos made the chords chapter click.
Was stuck on chord building for 20 minutes, scanned the code, watched the 2-min video, instant clarity. Best theory book I've bought.
I'm 56 and finally feel like I understand music.
Wish I had this 30 years ago. The Harmony chapter alone was worth twice the price.
Finally a theory book that doesn't feel like school.
I'd given up on theory three times before this. The 'why' explanations finally clicked. Now I'm writing songs again.
I keep it on my piano every practice session.
Lives on my piano. Open it, scan a QR, learn one concept, play. Repeat. Best $25 I've spent on music.
Mi nueva biblia de teoría.
Por fin un libro de teoría que entiendo. Los códigos QR con los videos de Melvin son oro puro.
Worth every cent of the investment.
Clear writing, no fluff, immediately useful. The Circle of Fifths finally clicked after years of trying.
Wish someone gave me this 10 years ago.
I'm a self-taught player and theory always felt out of reach. This book made scales feel obvious.
Real customers · Real reactions
Hear it from musicians
who've been through it.
Unedited videos from readers about their experience with the book. The good, the honest, and the "I wish I'd found this sooner" moments.
"@leylasmusic shares her honest take"
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"@daynabeemusic on why this book works"
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"@martin.dalesio cracks music theory"
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"@maxveresmusic writes his first song"
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"@beccasmelodies finally gets theory"
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"@sjplaysmusic recommends it"
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A complete learning system
One transformation.
Four tools.
The book teaches the framework. The companions make it stick.
The Book
The framework
120 pages from "what's a chord?" to "I can write any progression."
168,00 kr
Add to cart
The Mousepad
Daily reinforcement
The cheat sheet sits under your hands every day. Theory becomes muscle memory.
191,00 kr
Add to cart
Piano Stickers
Visual training
Label every key with removable note stickers. Train your eyes while you play.
77,00 kr
Add to cart
The Wall Poster
Passive learning
Scales, intervals, and the circle of fifths — always in your peripheral vision.
191,00 kr
Add to cart
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- 120-page PDF + EPUB · all 7 chapters
- QR video tutorials included
- Open on Kindle, iPad, Apple Books, anywhere
- 30-day refund
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- Full-color paperback (120pp)
- QR video tutorials included
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- QR video tutorials
- Worldwide tracked shipping
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Save more when you buy multiple books
Pre-bundled multi-book sets below — plus automatic quantity discounts on any combination.
Piano + Ukulele
Piano + Ukulele
From 252,00 kr
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Guitar + Bass + Piano + Ukulele
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Book + Cheat Sheet
Book + mousepad cheat sheet
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If the book doesn't help theory finally make sense, email us within 30 days. We'll refund every cent — no questions asked.
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Accessories for your Music Theory book.
64% of readers added at least one. Bundle & save up to 25% — plus unlock free gifts at €35 and €55.
The transformation
From confusion
to fluency.
This isn't about adding more information. It's about how you experience music from this point forward.
Before
- Memorizing chord shapes
- Stuck playing the same few chords
- Noodling without direction
- Confused when musicians talk theory
- Writing progressions that "sort of work"
- Freezing when someone calls a key
After
- Writing songs that actually sound the way you want
- Playing songs by ear instead of hunting for tabs
- Improvising with intention, not luck
- Learning new songs faster by recognizing patterns
- Jamming confidently in any key, across the whole keyboard
- Finally understanding what you're playing — and why
Questions
Frequently asked questions
Still wondering something? Contact us and we’ll get back to you fast.
What makes this different from free YouTube tutorials?
YouTube teaches isolated tricks. This teaches a connected system. Most free tutorials assume you already understand something the previous one didn't teach — so concepts never compound. This book gives you the framework that ties them together, in order, so each chapter builds on the last.
I'm a complete beginner. Is this too advanced for me?
No. The book starts with zero assumptions. Chapter 1 begins with the keyboard, note names and the music alphabet. Each chapter builds on the last. Most beginners report concepts clicking within the first week.
I've tried theory before and it always felt overwhelming. Why will this be different?
Because most theory is taught as abstract concepts on paper. This book teaches everything visually on the piano keyboard — where music theory is easiest to see. That's why readers say it finally clicks where other books didn't.
Do I need to read sheet music already?
No. You'll learn to read music inside the book — the Notation chapter covers it from scratch. Nothing is assumed. Everything starts at the beginning.
Does it work for my instrument, not just piano?
Yes. The theory in this book — scales, chords, progressions, rhythm, the circle of fifths — is universal. It's taught on the piano because that's where it's clearest to see, then it applies to any instrument you play.
What if it doesn't help me?
30-day full refund. No forms, no friction, no "tell us why." If theory still feels confusing after 30 days, we refund you and you keep what you've learned.
What's the difference between the PDF and the paperback?
Content is identical — same 120 pages, same QR videos. The PDF arrives instantly by email and is searchable on any device. The paperback is a full-color print edition shipped to your door. The Complete Edition tier includes both.
How long does shipping take?
Most paperback orders ship within 1–2 business days. Delivery typically takes 5–10 business days for the US, EU, UK, AU and CA. You'll get a tracking link by email as soon as your order leaves our warehouse. PDF orders are instant — delivered to your inbox within minutes of checkout.
How do the QR codes work? Do I need internet?
Each chapter has QR codes printed on the page. Open your phone's camera, point at the code, tap the link that appears, and the video starts. You'll need an internet connection to stream the videos, but the book itself works completely offline.
Is this only useful for pianists?
Not at all. The piano keyboard is simply the clearest way to see how music works — but every concept (scales, chords, harmony, rhythm, the circle of fifths) applies to guitar, bass, ukulele, voice, production, any instrument. It's a music theory book, taught on the keyboard.
How long does it take to finish the book?
There's no rush. Each chapter is built around bite-sized lessons with an estimated time at the top (most are 15–60 min). Reading cover-to-cover takes most readers 6–12 hours. But most don't read it once — they reference it for years. Think of it less like a novel, more like a manual you keep on your desk.
Can I get this if I'm in the EU? VAT & customs?
Yes — we ship worldwide. VAT is calculated at checkout based on your country, so the price you pay is the final price. For paperback orders within the EU, no separate customs fees apply.
Part of the Theory Simplified series
The same method, refined across five instruments.
Built on the same visual, plain-English approach that made Music Theory Simplified (the piano edition) a hit. Each book is independent — pick the one for your instrument.
Stop guessing.
Start understanding music.
A visual system built for self-taught musicians.
