Music Theory · Chapter 3 of 6

Scales & Modes

The note families every melody and chord comes from — major, minor, the seven modes, pentatonics and the blues.

PracticeScale Explorer →
Scales & Modes
A scale is a family of notes that belong together. Select a root key to see all 7 modes — each is the same notes as the major scale, but starting from a different degree, giving it a unique emotional color. The root note is highlighted in gold. Below the notes you'll see the diatonic chords that naturally fit that scale, plus each mode's step pattern.
Interactive Piano — See Any Scale

Pick a root and a scale type to light up the notes on the keyboard. The gold key is the root.

▶ Play Scale ▶ Play Root Triad
Root Scale note
Scale Step-Pattern Reference
Every scale is defined by its pattern of Whole steps (W = 2 semitones), Half steps (H = 1 semitone), and occasionally Whole-and-a-Half steps (W½ = 3 semitones). Learn the pattern once and you can play the scale in any key.
Mode Explorer — Every Mode's Chords in Every Key
Pick a mode. Each grid shows the seven chords that belong to it in every key — tap any chord to hear it. Start with Major and Natural Minor; the other five are the same notes starting from a different degree, each with its own colour.
Major Key — Diatonic Chord Grid
Every key produces 7 chords that naturally belong to it — called diatonic chords. This grid shows all of them across all major keys. The pattern is always I  ii  iii  IV  V  vi  vii° — uppercase = Major, lowercase = minor. Chord notes are shown below each chord name. Use this to find chords that sound good together in any key.
Natural Minor — Diatonic Chord Grid
The natural minor scale uses the same notes as its relative major, but starts on the 6th degree — giving it a darker, more emotional feel. Its chord pattern is i  ii°  III  iv  v  VI  VII. Notice: the i, iv, and v are now minor (lowercase), and the ii is diminished. This is why minor keys feel sadder.
Dorian Mode — Diatonic Chord Grid
Dorian is a minor mode — but with a raised 6th compared to natural minor. This one note makes a huge difference: it gives Dorian a brighter, "jazzier" minor feel. Formula: 1 2 ♭3 4 5 6 ♭7. The defining sound is the IV major chord — a major chord in an otherwise minor key. Used heavily in jazz, funk, and rock (think "Scarborough Fair", Santana, Miles Davis).
Phrygian Mode — Diatonic Chord Grid
Phrygian is the darkest of the minor modes, with a ♭2 — a half-step above the root. This creates an exotic, tense sound often associated with Spanish/Flamenco music and heavy metal. Formula: 1 ♭2 ♭3 4 5 ♭6 ♭7. The ♭II major chord (the chord built on the flattened 2nd degree) is its signature — a dramatic, unexpected major chord right next to the root. Hear it in: Metallica’s “Wherever I May Roam” and traditional Flamenco guitar.
Lydian Mode — Diatonic Chord Grid
Lydian is a major mode with a raised 4th (♯4), which gives it a dreamy, ethereal, slightly "floating" quality — brighter than regular major. Formula: 1 2 3 ♯4 5 6 7. You'll hear it in film scores (John Williams uses it often) and progressive rock. The ♯4 creates a tritone against the root, which is what gives it that magical tension despite being a major mode. Hear it in: “Flying” (the E.T. theme) by John Williams, and the Simpsons theme intro.
Mixolydian Mode — Diatonic Chord Grid
Mixolydian is a major mode with a ♭7 — one note lower than regular major. This gives it a bluesy, rock feel while still sounding bright. Formula: 1 2 3 4 5 6 ♭7. It's everywhere: blues, rock, folk, Celtic music. The ♭VII major chord is its trademark — think the intro riff to "Sweet Home Alabama" or "Hey Jude."
Locrian Mode — Diatonic Chord Grid
Locrian is the most dissonant and rarely used mode. It's like natural minor but with a ♭2 and a ♭5, making the root chord a diminished triad instead of a stable minor. Formula: 1 ♭2 ♭3 4 ♭5 ♭6 ♭7. Because the home chord itself is unstable, Locrian has no true "resting point" — which is why it's used for extreme tension in metal, horror soundtracks, and avant-garde music. Rarely used in full songs; more common as a passing mode.
Harmonic Minor Scale
The harmonic minor scale is the natural minor scale with one change: the 7th degree is raised by a semitone. This creates a leading tone — a note just a half-step below the root — which pulls powerfully back to the tonic. The result is the distinctive sound of classical music, flamenco, metal, and Middle Eastern music. Formula: 1 – 2 – ♭3 – 4 – 5 – ♭6 – 7 (the raised 7th is the key difference from natural minor).
WHY IT MATTERS (PIANO): The raised 7th turns the v chord (minor) into a V major chord — giving you a proper dominant that resolves cleanly to the i chord. This V→i resolution is the harmonic engine of most classical and tonal music in minor keys. On piano, the raised 7th is the note one semitone below your root (e.g. in A harmonic minor: G# instead of G).
Major Pentatonic Scale Chart
The pentatonic scale is the most beginner-friendly scale for improvisation — it only uses 5 notes (the major scale with the 4th and 7th removed). Because those two notes are the "tension" notes of the major scale, the pentatonic almost always sounds right, no matter which chord is playing. It's the go-to scale for country, pop, and folk solos. The highlighted (purple) notes are the pentatonic; the gold note is the root.
HOW TO USE: Pick a key your song is in, select it below, and those 5 notes are your safe zone for soloing or melody-writing. You can play any of them in any order over the chords of that key — they'll almost always sound right.
Minor Pentatonic Scale
The minor pentatonic is the single most used scale for soloing in rock, blues, and pop. It uses 5 notes from the natural minor scale — omitting the 2nd and 6th (the two most "tense" minor notes), leaving only the core expressive tones. Formula: 1 – ♭3 – 4 – 5 – ♭7. It shares the same 5 notes as its relative major pentatonic — just starting from a different root.
PIANO TIP: The minor pentatonic on piano is the easiest scale for improvisation in a minor key — every note sounds good over the i, iv, and v chords. In A minor, the notes are A – C – D – E – G. Try playing these over an Am–Dm–Em progression and you can't go wrong.
RELATIONSHIP TO MAJOR PENTATONIC: The A minor pentatonic (A–C–D–E–G) uses the exact same notes as the C major pentatonic (C–D–E–G–A). They are relative — just starting from a different note. This is why guitarists and pianists switch between them freely.
Minor Blues Scale Chart
The blues scale is the minor pentatonic with one extra note added: the ♭5, called the "blue note" (marked with *). This note creates the characteristic tension and expressiveness of blues music. It's slightly "wrong" — which is exactly what makes it so right. The blues scale is your best friend for rock, blues, jazz, and soul improvisation. Try playing it over a I–IV–V progression in any key.
THE BLUE NOTE: The ♭5 (marked *) is the "wrong" note that makes the blues sound so expressive. You don't hold it — you slide through it. Lean into it, then resolve to the 5th or 4th. That tension-release is the soul of blues phrasing.