Music theory · 6 min read

Modes explained, from Dorian to Locrian

The seven modes are the major scale started from each of its degrees. Here is what each sounds like, the note that defines it, and where to hear it.

2026-07-02

Same notes, different centre

Play the white keys from C to C and you have the major scale, which in modal language is called Ionian. Now play the white keys from D to D. Not one note has changed, but the pattern of tones and semitones has rotated, and the scale sounds quite different. That is Dorian, and it is the second mode.

Seven starting points give seven modes: Ionian from C, Dorian from D, Phrygian from E, Lydian from F, Mixolydian from G, Aeolian from A, and Locrian from B. The Greek names are inherited from medieval theorists who attached them, somewhat inaccurately, to ancient Greek terminology. Nobody should feel obliged to defend the naming.

The critical point, and the one that takes longest to sink in, is that a mode is defined by which note the music treats as home, not by which notes are available. A piece using only white keys is in D Dorian if the music keeps returning to D, cadencing on D, and treating D as the resting place. If it keeps returning to C, it is simply in C major. Change the centre of gravity and everything above it changes too.

The seven, and what each one does

The fastest way to learn a mode is to compare it with the major or minor scale on the same starting note and notice the one or two notes that differ. That difference is the mode's fingerprint.

Ionian is the major scale itself. Lydian is major with a raised fourth: F Lydian is F, G, A, B natural, C, D, E. That B natural instead of B flat gives an open, floating, faintly weightless quality. Film composers reach for it constantly for scenes of wonder or flight.

Mixolydian is major with a lowered seventh: G Mixolydian is G, A, B, C, D, E, F natural. It has a major third, so it is bright, but the flattened seventh removes the leading note's pull to the tonic. The result sounds rooted rather than striving, which is why it dominates rock, blues-derived writing and a large quantity of Celtic dance music.

Dorian is minor with a raised sixth: D Dorian is D, E, F, G, A, B natural, C. Minor in colour but with one bright note that keeps it from sounding mournful. Think Scarborough Fair, or So What, or most modal jazz of the late fifties.

Aeolian is the natural minor scale. Phrygian is minor with a lowered second: E Phrygian is E, F natural, G, A, B, C, D. The semitone right at the bottom of the scale gives it the Spanish, darkly ceremonial character that flamenco is built on. Locrian lowers both the second and the fifth, which destroys the stable perfect fifth above the tonic and leaves the mode with almost nothing to stand on. It is largely a theoretical curiosity, and honest teachers admit as much.

Making a mode audible

Modes collapse instantly back into ordinary major or minor if the harmony does not support them. Play D Dorian over a C major chord and the ear hears C major with a tune that happens to start on D.

The remedy is a drone or a static bass. Hold a low D, play the white notes above it, and Dorian becomes unmistakable. This is exactly how the music that uses modes natively does it: bagpipes, hurdy-gurdy, Indian classical music and a good deal of folk fiddle repertoire all have a sustained tonic underneath, and modal writing evolved with that support.

The other approach is to use the chords native to the mode and to avoid the dominant-tonic cadence, since that cadence is what defines major and minor and will drag any mode back towards them. Dorian leans on the minor tonic chord and the major fourth chord, D minor to G major. Mixolydian uses the major tonic and the major flattened seventh, G major to F major. Avoid the leading note, and the mode survives.

Modes at the instrument

The accordion is unusually well equipped for modal playing, because the left hand can supply exactly the drone the mode needs. Hold a single fundamental bass button and let it sound through a phrase, or alternate the bass note with its fifth, and you have a bagpipe. On a free-bass or converter instrument you can sustain a genuine pedal note indefinitely while the right hand moves, which no piano can do.

There is a caution with the Stradella chord rows: the preset seventh buttons contain a leading note that will pull your Dorian straight back into a key. For modal accompaniment, prefer the plain fundamental row and the major or minor triads, and leave the seventh buttons alone.

On the double bass, the open strings are a modal gift. E, A, D and G let you sustain a drone under almost any folk mode with no effort at all, and the sympathetic ringing of an open string under a modal tune is a sound no fingered note reproduces. A D drone under a Dorian melody, with the bow drawn slowly and the left hand doing nothing, is the oldest trick in European folk music and still the most effective. We use it in first-year ensemble work at A&G Academy precisely because it makes the theory audible in about ten seconds.

Frequently asked

What is the difference between a mode and a scale?

A mode is a scale, so the words overlap. In practice, mode usually means one of the seven rotations of the major scale, each with a different home note. The distinction that matters is functional: modal music avoids the dominant-to-tonic cadence that defines major and minor, and often rests on a drone instead.

Which mode should I learn first?

Dorian and Mixolydian, because they appear most often in real repertoire and each differs from a familiar scale by exactly one note. Dorian is natural minor with a raised sixth; Mixolydian is major with a lowered seventh. Learn those two properly, then Lydian. Locrian can wait indefinitely without any harm.

Why does playing a mode often just sound like the major scale?

Because the harmony underneath is still defining the major key. If you play D Dorian over C major chords, the ear hears C major. Put a sustained D in the bass, use chords native to the mode, and avoid the leading note, and the mode asserts itself immediately. Modes need harmonic support to exist.


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