See the music. Learn the theory behind every color.
Step-by-step exercises that open ChordColor with the right settings pre-loaded. Each lesson builds on the last — start at Level 1 and work your way up.
In-depth articles on music theory concepts.
The fundamental elements of music theory: notes, intervals, and how they relate.
Western music is built on 12 distinct pitches that repeat in a cycle. These notes — C, C#, D, D#, E, F, F#, G, G#, A, A#, B — form the complete alphabet of music.
An interval is the distance between two notes, measured in semitones. Intervals are the most important concept in music theory — they determine whether a chord sounds happy or sad, and whether a melody feels tense or resolved.
ChordColor assigns a unique color to each of the 12 intervals. The root is always red, a major 3rd is always yellow, a perfect 5th is always blue — no matter which instrument you are looking at or which key you are in.
An octave is the distance of 12 semitones — the point where a note repeats at a higher or lower pitch. The note C in any octave shares the same musical identity as C in every other octave, just higher or lower.
Major, minor, modal, and exotic scales — the pools of notes melodies and chords are drawn from.
The major scale is the foundation of Western music — the familiar "do re mi fa sol la ti do." It uses 7 of the 12 notes, selected by the pattern whole-whole-half-whole-whole-whole-half (W-W-H-W-W-W-H).
The minor scale is the second most important scale in Western music. Where major sounds bright and happy, minor sounds dark and melancholic. Its formula lowers three notes compared to major: the 3rd, 6th, and 7th.
The seven modes are seven different scales built from the same set of seven notes, each starting on a different degree. Each mode has a unique mood — from the bright Lydian to the dark Phrygian to the unstable Locrian.
Pentatonic scales use only 5 notes, making them the simplest and most universally used scales in music. The blues scale adds one extra "blue note" — the tritone — to the minor pentatonic, giving it the grit and tension of the blues.
Scale degrees number the notes of a scale from 1 to 7. Each degree has a name that describes its role: the 1st is the "tonic" (home), the 5th is the "dominant" (strongest pull), and the 7th is the "leading tone" (pulls back to home).
Triads, 7ths, extensions, and altered chords — how notes stack to create harmony.
A triad is a three-note chord built by stacking two intervals of a third. There are four types: major (bright, happy), minor (dark, sad), diminished (tense, anxious), and augmented (bright but unstable).
Suspended chords replace the 3rd with either the 2nd (sus2) or 4th (sus4). Since the 3rd determines major vs. minor, removing it creates an ambiguous, floating sound that wants to resolve.
Seventh chords add a fourth note to a triad — a note that is some kind of 7th above the root. The dominant 7th creates bluesy tension that demands resolution. The major 7th sounds dreamy and sophisticated. The minor 7th is smooth and mellow.
Extended chords add 9ths, 11ths, and 13ths on top of seventh chords, creating rich, complex harmonies used in jazz, R&B, and neo-soul. Altered chords modify these extensions with sharps and flats for maximum tension.
A power chord is just two notes: the root and the perfect 5th. With no 3rd, it is neither major nor minor — just raw, strong, and clean even under heavy distortion. Power chords are the backbone of rock, punk, and metal.
Chord symbols are shorthand for communicating chords: "Cmaj7" means C major seventh, "Dm" means D minor, "G7#9" means G dominant seven sharp nine. Learning to read them fluently is essential for working with chord charts and lead sheets.
How chords relate to each other within a key, and how keys give music its emotional center.
A key defines the tonal center of a piece of music — the note and scale that feel like "home." When a song is "in the key of G major," the melody and chords are drawn primarily from the G major scale. There are 24 commonly used keys: 12 major and 12 minor.
Diatonic chords are the 7 chords you can build using only the notes of a scale. In every major key, the pattern is the same: I-ii-iii-IV-V-vi-vii° — three major, three minor, and one diminished. These 7 chords form the harmonic vocabulary of a key.
Roman numerals describe chords by their position in a key, not by their note name. Uppercase means major, lowercase means minor, and the ° symbol means diminished. This system lets musicians discuss harmony in any key.
Chord function describes the role a chord plays in a key. There are three primary functions: tonic (home, stability), dominant (tension, urgency), and subdominant (movement, departure). Almost all harmonic motion is organized around these three roles.
Keys are connected to other keys through four relationships: relative (same notes, different tonic), parallel (same root, different mode), dominant (a 5th up), and subdominant (a 5th down). These relationships explain why certain key changes sound smooth.
Common and classic chord progressions — the backbone of songs in every genre.
A chord progression is a sequence of chords played in order — the harmonic backbone of a song. Progressions determine the emotional arc: tension, release, sadness, joy. They are described using Roman numerals, making them work in any key.
ChordColor includes 16 built-in progressions that cover the most important patterns in Western music — from the ubiquitous I-V-vi-IV ("Let It Be") to the jazz ii-V-I to the blues turnaround, each with famous song examples.
The Nashville Number System uses Arabic numbers (1, 4, 5) instead of chord names to write chord charts. It conveys the same information as Roman numerals but is optimized for speed in recording sessions — change the key and nobody rewrites a thing.
How the same chord can be played in different ways to create different sounds and movement.
Instrument-specific music theory: tunings, positions, and unique harmonic possibilities.
String instruments like guitar, bass, banjo, mandolin, and ukulele each have a specific tuning that determines which chord voicings are possible. ChordColor supports standard, drop, and open tunings, with moveable chord shapes that transpose by sliding up or down the fretboard.
Beyond strings, ChordColor supports keyboards (piano, organ), isomorphic grid controllers (LinnStrument, Push, Launchpad), harp with its lever system, accordion with Stradella bass, and kalimba with its alternating left-right layout.
A capo clamps across all strings at a specific fret, raising every open string by that many semitones. It lets you change the key without changing your finger patterns. Transposition works the same way but without a capo — every chord root shifts by the same number of semitones.
Time signatures, note values, syncopation, and the rhythmic foundations of music.
Tempo is the speed of the beat, measured in BPM (beats per minute). Note durations divide the beat into halves, quarters, and smaller subdivisions. Time signatures tell you how beats are grouped into measures — 4/4 is by far the most common.
A drum pattern is a repeating rhythmic figure on kick, snare, and hi-hat. You can often identify a genre from the drum pattern alone. ChordColor Studio includes 8 built-in styles — from rock and funk to bossa nova and hip-hop — with ghost notes for realistic grooves.
Songs are organized into sections — verse, chorus, bridge, and more — that serve different roles in the emotional arc. Chord charts use bracket notation to show when chords change relative to lyrics, and transposition lets you shift everything to a different key.