Interactive Music Theory
Understand by ear.
No more theory confusion.
Diatonic chords, chord progressions, scales, circle of fifths, and transposition — learn by actually playing sounds, not just reading about them.
Learn Faster
Grasp tricky theory through sight and sound.
Tools that make sound
Change the key or tempo and instantly hear how chords and scales actually sound.
Read, then hear it confirm
Play buttons are embedded in every article so you can verify what you read in real time.
Clear, natural English
Approachable for beginners, yet practical enough for real-world use.
Start by goal
Look up a chord fast
Search by chord name or identify a chord from notes on the keyboard.
Start by goal
Understand diatonic chords
Hear how each degree functions inside a key instead of memorizing shapes only.
Start by goal
Write a progression
Build chord progressions step by step with emotional guidance and playback.
Tools
Interactive Tools
Tap to hear sound instantly
Diatonic Chord Reference
Select a key to see its diatonic chords. Tap any chord to hear it.
Scale Dictionary
Browse scales on a keyboard or fretboard. Listen and learn.
Chord Finder
Look up chord tones by name, or tap notes on the keyboard to identify a chord.
Circle of Fifths
Tap the circle to hear each key. Visualize key relationships at a glance.
Articles
Learn Music Theory
Well-organized explanations
What Are Diatonic Chords?
Learn the fundamental chords of music theory
Well-organized explanations
Top 10 Essential Chord Progressions
From pop to jazz, the progressions you need to know
Well-organized explanations
What Is a Scale?
Understand how note sequences create different moods
Well-organized explanations
What Is the Circle of Fifths?
Visualize key relationships and musical structure