Free online course Guitar Music Theory Masterclass: Scales, Modes, Chords and Progressions

About the free online course

If you can play shapes but still feel unsure about what the notes mean, this free online course helps you turn guitar technique into real musical understanding. Instead of memorizing disconnected patterns, you’ll learn the logic that links intervals, the musical alphabet, and octave and unison relationships across the fretboard so you can locate sounds on purpose and hear what you’re playing before your fingers move.

From there, the course builds the major scale as a practical map for classical guitar and beyond. You’ll see how keys are constructed, how sharps and scale degrees function, and how scale patterns differ from positions so your navigation stays consistent anywhere on the neck. That foundation makes harmony feel less like a mystery and more like a toolkit: you’ll connect major, minor, diminished, and augmented triads, explore inversions, and understand how chord quality changes when the shapes move across string sets, including the unique adjustment around the B string.

As you progress, you’ll develop a strong grasp of diatonic harmony and chord progressions, learning to recognize the role of I, IV and V, identify the key of a song, and choose voicings that create smooth voice leading. You’ll expand into seventh chords, drop voicings and shell voicings, building richer textures while keeping the guitar playable and clear. The course also strengthens your modern harmony vocabulary with suspended chords, power chords, slash chords, borrowed chords, secondary dominants, blues movement, and modulation, so you can analyze music and create progressions that sound intentional.

Modes, pentatonics, arpeggios, and additional scale families are integrated as musical solutions, not isolated theory. You’ll understand how modes relate to the major scale, how to apply them over different chord types, and how to target strong chord tones while soloing. By the end, you should be able to interpret chord symbols, craft progressions, and improvise with a clearer ear and a more informed fretboard—skills that translate directly into better practice, better arranging, and more confident performance.