Plenty of places teach you a song.
This one teaches you to understand it.
Chords, scales, theory, and ear training that explain the why behind the notes, so you can eventually play on your own. Open reference, no login required.
Tap the keys below, or play A–; on your computer keyboard.
Play something — I’ll name it.
● Hold two notes for an interval, three or more for a chord.C4 – B5 · sound on
Find anything
Type it the way you say it.
Search understands notation. Type C♯m7, c sharp minor 7, Ddim, or dorian and it returns the reference page plus the idea behind it.
Try:C♯m7D dorianE♭maj7circle of fifthsA harmonic minor
The library
Go straight to the shelves.
01Chords774 pages · 43 qualitiesEvery key and quality, with the notes spelled out and explained.Browse chords →02Scales & Modes576 pages · majors, minors, modesEvery scale and mode, with fingering and key signatures.Browse scales →03TheoryGuides & lessonsFrom intervals to voice leading, with the why behind the keys.Learn theory →04SongsClassical breakdownsFamous works broken down, measure by measure.Explore songs →05ToolsInteractive trainersTrainers, games, and visualizers you can use right now.Open tools →
Where to begin
We’ll figure out what you already know.
A short diagnostic maps your starting point and charts what to learn next.
No login required.