Every chord, scale, and string — one hub.

Interactive music theory tools for guitar, bass, and piano. Explore the Circle of Fifths, CAGED shapes, capo positions, and build progressions you'll actually use.

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Guitar

Fretboard scales, CAGED shapes, chord diagrams, and a capo explorer.

Bass

Full fretboard scale positions and interval maps for bass guitar.

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Keyboard

Interactive piano keys with scale and chord highlighting.

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Chord Builder

Build and hear chord progressions in any key, major or minor.

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Practice Tools

Circle of Fifths, chromatic tuner, metronome, and song key analyzer.

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Quick Tips

A fast rundown of what's in each section and where to start.

How to Play

A quick starter guide to reading what's on screen and turning it into real fingers on real strings/keys. No music theory here — just the practical basics. Go at your own pace, jump around however you like.

🎸 Guitar & 🎸 Bass

Reading a Chord Diagram

Every diagram is a tiny picture of the neck, standing straight up. The vertical lines are strings (low E on the left, high E on the right), and the horizontal lines are frets. A colored dot means "put a finger here." An O above a string means play it open (no finger). An X means don't play that string at all.

Finding the Root Note

The root is just the note the chord (or scale) is named after — a "C" chord's root is the note C. On the fretboard, the app marks the root with a slightly brighter or ringed dot so you can always spot "home base" even inside a bigger shape.

What a Capo Actually Does

Clamping a capo on a fret shortens every string by that many frets — it's like moving the guitar's "zero" point up the neck. So the exact same finger shape you already know now makes a different chord ring out. The Capo Explorer shows you both sides: the shape you're actually fretting, and the real chord it sounds like.

CAGED Shapes, Simply

Five basic open-chord shapes — C, A, G, E, D — can each be picked up and slid anywhere on the neck to become a different chord, as long as you know where the root lands. That's the whole idea behind "CAGED": one shape, movable everywhere. The CAGED System tool shows all five shapes for the same root, stacked up the neck.

Strumming vs. Picking One Note at a Time

Strumming plays every note in the chord at once, in one motion. Picking the notes one at a time (often called "arpeggiating") plays them individually in sequence instead — same notes, different feel. Look for the Arpeggio toggle next to Play in Chord Library, Capo Explorer, and Chord Builder to hear the difference yourself.

🎹 Keyboard

Reading the Keyboard Layout

White keys are the natural notes (C, D, E, F, G, A, B), repeating in order left to right. Black keys sit between most white keys in groups of 2-then-3 — that pattern is your landmark for finding any note fast, since C is always the white key right before a group of 2 black keys.

How Highlighted Keys Map to a Chord/Scale

When you pick a chord or scale, the matching keys light up right on the keyboard — so you can see exactly which fingers to use and how they're spaced, instead of just reading a name like "Am7" and guessing.

Playing with Your Computer Keyboard

No piano handy? Toggle "Keyboard: On" and your computer's keys play notes directly — handy little badges above each key show exactly which key triggers which note, and Z / X shift you down or up an octave.

Effects Pedals

🎵 Chord Finder

Pick a root and chord type to see its notes highlighted across the fretboard.

Root

Type

Select a chord

Scale Explorer

Overlay any scale across the bass fretboard. Pick a root and mode to apply instantly.

Root

🎯 Bass Root Note

Pick a root to mark one playable position on the fretboard.

Root

Swipe horizontally to navigate frets →

Scale Notes

🎶 Scale Explorer

Pick a root and mode to see its notes highlighted across the keyboard.

Root

🎹 Chord Finder

Pick a root and chord type to see its notes highlighted across the keyboard.

Root

Type

Select a chord

⌨ The badges above each key's note show your computer-keyboard mapping. Z / X shifts it down/up an octave.

Scale Notes

🎹 Chord Inversions Click to highlight on keyboard

Sound (applies to both sections below)

🎹 Chord Progression Builder

Pick a root · pick a quality · add to your sequence · play it back

Root Note

Quality

Sequence 0 / 8 chords

↑ Pick a root and quality above, then hit Add

BPM Beats

🎼 Chords by Key

Pick a key and mode to see its diatonic chords and common progressions.

Key

Mode

Common progressions

Progression: