Hear music
in color.

Hear the shape of music. See its patterns in color. Learn theory by playing, listening, and discovering what makes a song work.

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CC♯DD♯EFF♯GG♯AA♯BCHROMAnote · color
Lesson path I

The Major Foundations

Notes, scales, and your first chords.

5 units · 0/23 lessons0%
Unit 1 · notes

Chromatic Notes

All twelve notes, one loop.
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1.1
All the letters
A through G. Each letter is a frequency.
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1.2
Sharps & flats
Two names, one key. And Big Cats Eat Fish.
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1.3
Higher or lower
Two notes. Which way did the pitch move?
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1.4
Octaves
Double the frequency, same letter.
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1.5
The chromatic scale
Twelve equal steps, one semitone each.
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Practice this unit:QWERTY piano ⚒Singing trainer ⚒
Unit 2 · scales

Major Scale

Seven from twelve: W–W–H–W–W–W–H.
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2.1
Whole & half steps
Two step sizes build every scale.
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2.2
The major scale formula
W–W–H–W–W–W–H. Do re mi, spelled out.
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2.3
Every note has a number
Scale degrees 1–7. And do is home.
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2.4
Distances have names
Seconds, thirds, fifths. The gaps between notes.
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2.5
The circle of fifths
Twelve hops of a fifth loop through every key.
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2.6
Melodies in the scale
Steps, skips, and three tunes you know.
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Practice this unit:Intervals ◓Scale room ◓Degree dash ◓Interval room ◓Interval reach ◓Melodic dictation ◓Echo keys room ◓Song sketchpad ⚒
Unit 3 · chords

Building Chords

Root, third, fifth, played together.
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3.1
Building triads
Root, third, fifth. Two skips up.
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3.2
Major triads
Four semitones, then three, from any root.
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3.3
Major vs. minor
One middle note decides the mood.
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3.4
Diminished & augmented
Lower or raise the fifth.
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Practice this unit:Chord builder room ◓Chord quality ◓Chord quality room ◓
Unit 4 · chords

Chords of the Key

Seven chords live in every key.
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4.1
A chord on every step
Build a triad on each degree of the scale.
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4.2
Chords from the scale
Root, skip, skip on any degree. Only scale notes.
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4.3
Why the 7th chord is diminished
The scale's shape sets each chord's quality.
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4.4
Every chord has a job
Rest, motion, tension. V points home to I.
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Practice this unit:Chord dictation ◓Chord builder room ◓Chord progressions ◓
Unit 5 · progressions

Progressions

From two-chord loops to four-chord songs.
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5.1
Home and away
Two-chord loops. Leave, then return.
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5.2
The pop loop
I–V–vi–IV. And its famous rotation.
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5.3
More ways home
Rock, jazz, and doo-wop take different roads.
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5.4
Follow the song
Hear a loop, tap the path it took.
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Practice this unit:Chord progressions ◓Progression room ◓Progression looper ⚒
The road continues
Up nextThe Minor FoundationsMinor keys and their chords.scaleschordsprogressions3 units · 10 lessonsStart →ModesRotate the scale. Borrow its chords.scaleschords2 units · 9 lessonsStart →Rhythm & GrooveFeel the beat, count it, write it down.rhythm5 units · 21 lessonsStart →Reading MusicBoth clefs, at sight.reading2 units · 10 lessonsStart →Song CraftHow songs are built. Then build one.progressionssongwriting3 units · 10 lessonsStart →More ChordsSevenths, jazz moves, and inversions.chords3 units · 12 lessonsStart →More ScalesPentatonics, blues, and stranger flavors.scales2 units · 6 lessonsStart →How Sound WorksWaves, overtones, and why twelve notes.sound1 units · 4 lessonsStart →GuitarThe theory you know, under your fingers.noteschordsscales3 units · 11 lessonsStart →
Beyond the lessons
Reference shelfThe lessons teach; this shelf answers. Every scale, chord, and rhythm value in one place, and all of it plays.open →ToolsThe small machines musicians keep within reach: looper, sketchpad, metronome, tuner, transposer. Nothing here grades you.open →Practice roomsEvery room trains one skill. Name what you hear, or turn it around and play, tap, and sing the answers.open →