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Genre Deep Dives
The ii–V–I Progression in Jazz: Theory and Application
Master the ii–V–I, the most important chord progression in jazz. Learn how it works harmonically, how to voice it on …

Chord Theory
Suspended Chords: Sus2, Sus4, and the Art of Tension
Learn how suspended chords are built by replacing the third with the second or fourth, why they create tension, and how …

Music Fundamentals
What Are Intervals and How to Identify Them by Ear
Learn what musical intervals are, how to measure them in half steps, and practical techniques for recognising them by …

Music Fundamentals
How to Analyse Any Song's Harmony in 5 Steps
A practical five-step framework for harmonic analysis. Learn to identify the key, label chords with Roman numerals, spot …

Scale Theory
The Double Harmonic Scale: From Miserlou to Metal
Explore the double harmonic scale — its unique interval structure, Middle Eastern roots, and use in surf rock, metal, …

Tools and Features
See Your Scales and Chords on the Guitar Fretboard
The Interactive Chord Finder now includes a guitar fretboard view. Switch between piano and guitar to see scale notes, …