Your guitar neck isn’t a maze of frets to memorize. It’s a regular, logical machine, and once you get the keys, everything becomes readable. Eight progressive lessons, with interactive visuals and real sounds from the Twelve Assistant app, to go from “I put my fingers where they tell me” to “I know what I’m playing, and why.” From standard tuning all the way to triads and pentatonic scales sliding under your fingers.
The series, in order
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1
Standard Guitar Tuning: E-A-D-G-B-E
Why these six notes, in this order. The genius compromise behind your tuning, the twin strings, and the G-B exception that will follow you through the entire series.
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2
How to Tune a Guitar, With or Without a Tuner
Tuner, 5th fret method, harmonics, by ear: what each method is worth, the move that makes tuning stick, and why your guitar goes out of tune.
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3
Guitar Fretboard Layout: How It Works
One fret = one half step, everywhere. Why frets get closer, why the 12th fret cuts the string in half, and why the same note exists in multiple places.
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4
Find Any Note on the Fretboard
No need to memorize 150 frets: two master strings, landmark dots, octave shapes, and deduction does the rest in one second.
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5
How to Read Guitar Chord Diagrams
Dots, circles, X’s, barres: the universal language of guitarists decoded step by step, with the five chords everyone learns first.
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6
Music Theory on Your Fretboard
An interval is a shape, a scale is a sliding pattern, a chord is a visible triad. Theory becomes geometry, and transposing becomes a game.
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7
Guitar Triads on the Fretboard
Three notes on three adjacent strings: build your own chords without diagrams, target your first improv notes, and truly map your neck.
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8
Pentatonic Scales for Guitar
The finale: the guitarist’s favorite scale, truly understood. The two gaps that make it safe, the box, the triad skeleton, the connections, and the blue note of the blues.
The other half of the journey: music theory
This series teaches you the instrument; its twin teaches you the music. The Music Theory for Guitar series (10 lessons, from sound to harmonization) explains the notes, intervals, scales, chords, and degrees you’ll find here on the neck. Read them in any order: they answer each other on every page.
What’s next? Put your neck to work
When the neck is understood, you still need to use it. The Guitar Practice Guide series gives you practical guides to play, sing, and create, starting with your first chord progressions.
Explore your fretboard interactively
Twelve Assistant’s Fretboard Explorer displays strings, notes, and scales across the entire neck, right in your browser. No account, no credit card.
Open the demo