The Modes
Start the major scale on a different note and you get a different scale with a different mood — seven of them, each with one note that gives it away.
Builds on: 2.1 The Major Scale2.2 Minor Scales
Seven scales hiding in one
Play the white keys from C to C and you get C major. Play the same white keys from D to D and something odd happens: it is not D major (that needs F♯ and C♯) and not D minor either (that would need B♭). It is a scale of its own, with the whole-and-half-step pattern of C major rotated to start on the second note. This is a mode. The major scale has seven notes, so it has seven rotations — seven modes — and monks in the Middle Ages gave them Greek names that we still use:
You already know two of them by other names. Ionian is simply major. Aeolian is the natural minor scale from Unit 2. The other five are the interesting ones: each is almost major or almost minor, with exactly one note bent out of place — and that one note is its whole personality.
The characteristic note
Compare each mode with the major or minor scale it most resembles and one degree differs. That degree is the characteristic note, and if you want to hear the mode, you lean on it:
- Lydian = major with a ♯4. Floating, wide-eyed, slightly weightless. The Simpsons theme, much of John Williams.
- Mixolydian = major with a ♭7. Relaxed, bluesy, rock-and-roll. Norwegian Wood, Sweet Home Alabama, every bagpipe tune.
- Dorian = minor with a ♮6 (raised sixth). Cool and a little hopeful — minor without the gloom. Scarborough Fair, Miles Davis’s So What, Eleanor Rigby.
- Phrygian = minor with a ♭2. Dark, tense, Spanish; flamenco lives here, and so does a lot of metal.
- Locrian = minor with a ♭2 and ♭5. Its tonic chord is diminished, so it never settles — almost no melodies use it.
Bright to dark
Line the modes up by how many notes are lowered and they form a ladder from bright to dark: Lydian → Ionian → Mixolydian → Dorian → Aeolian → Phrygian → Locrian. Each step to the right flattens one more note by a semitone (♯4 becomes ♮4, then ♮7 becomes ♭7, then ♮3 becomes ♭3, and so on). That is why Lydian sounds like sunlight and Phrygian like a shadow: they are the same seven notes with the tuning pegs turned one at a time.
Two ways to think about a mode
The relative view: D Dorian is C major started on D — same notes, same signature, different home. Useful for finding the notes quickly. The parallel view: D Dorian is D minor with a raised sixth — same root, one altered note. Far more useful for hearing, because the mood of a mode comes from what changed relative to the major or minor scale on the same root. The lab shows both: the parent scale on the right, the characteristic note in amber on the piano.
The white keys are only the easy case. Rotate any major scale and you get the modes on other roots: G Dorian is F major from G; E Lydian is B major from E; A Mixolydian is D major from A. The parent is always a fifth-ish away, and the lab computes it for you.
Explore all seven on one root, then let the second lab play a two-bar vamp for each: the difference between Dorian and Aeolian is one note, and after this lesson you will hear it every time.
🎼 Lab — Mode Explorer
Pick a root and a mode. The piano marks the tonic, the scale and — in amber — the characteristic note; the canvas shows the step pattern, the parent major scale and where the mode sits on the bright-to-dark strip.
- Keep D as the root and step through Dorian, Aeolian and Phrygian: each one lowers one more note.
- Try C Lydian: only F♯ separates it from C major — play the scale and listen for the lift on the fourth note.
- Compare G Mixolydian with G major: the F is the whole difference between a folk tune and a hymn.
🎼 Lab — Same Root, Seven Colours
One root, seven vamps. Each button plays two bars of the mode’s tonic chord with a melody that leans on the characteristic note.
- Play Lydian, then Locrian, straight after one another: that is the whole span of the ladder.
- Play Dorian and Aeolian back to back and listen for the sixth note.