A mode is a scale you get by taking the major scale and treating a different one of its notes as home. Same seven notes, a different note as the centre of gravity, and the whole mood shifts. There are seven modes, from the plain major sound of Ionian to the unstable Locrian, and knowing them gives you seven ready made moods to write in without ever leaving a single key.
Plain theory, no instrument required. It works the same on a piano, a guitar, or in a piano roll, in any key and any style.
A mode is a scale you get by taking a familiar scale, usually the major scale, and treating a different note inside it as home. The notes stay the same. What changes is which one the music leans on and comes to rest on, and that change of home is enough to change the whole feel.
The clearest way to see it is on the white keys of a piano, which spell C major: C, D, E, F, G, A, B. Play only those notes but decide that D is home, so everything gravitates towards D and settles on D, and you are playing D Dorian. Do the same starting on E and you get E Phrygian, and so on up the row. Each starting note gives one of the seven modes, all built from the very same seven notes.
So what makes a mode its own thing is not the notes, since it shares them with C major, but which note you treat as the tonic, the home note. Move the centre and you move the pattern of tones and semitones around it, and that pattern is what the ear reads as the mood. If the words tonic, semitone or major scale feel shaky, our guide to scales and keys lays the groundwork this one builds on.
There are seven modes of the major scale, one for each note you can start on, and in order they are Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian and Locrian. Worked in C major, each one starts on the next white key up, so the whole set uses nothing but white keys.
| Mode | Starts on (in C) | Character |
|---|---|---|
| Ionian | C | The major scale itself, bright and settled |
| Dorian | D | Minor with a raised sixth, jazzy and hopeful |
| Phrygian | E | Minor with a flat second, dark and Spanish |
| Lydian | F | Major with a raised fourth, bright and dreamy |
| Mixolydian | G | Major with a flat seventh, bluesy and rock |
| Aeolian | A | The natural minor scale, dark and serious |
| Locrian | B | Diminished and unstable, a flat second and flat fifth, rarely used |
Two of them you already know under other names. Ionian, starting on C, is simply the major scale. Aeolian, starting on A, is the natural minor scale. The other five sit between those two poles, each leaning bright or dark depending on its third, with one or two notes shifted that give it a flavour of its own.
The quickest way to tell the modes apart is that one shifted note, often called the mode's characteristic note. Dorian is a minor scale with a raised sixth. Phrygian is a minor scale with a flat second. Lydian is a major scale with a raised fourth. Mixolydian is a major scale with a flat seventh. That single altered note, compared with the plain major or minor scale, is where most of the character lives.
Broadly, three of the modes lean bright and major, three lean dark and minor, and one is unstable, though how any of them actually lands depends on the music around it. Here is each in turn, named by its starting note in C major.
Ionian, on C, is the plain major scale, the sound of most bright, settled, resolved music. It is the reference the brighter modes are heard against.
Dorian, on D, is a minor sound, but a shade warmer than plain minor because of its raised sixth. It tends to read as hopeful or cool rather than sad, and it turns up often in jazz, funk and folk.
Phrygian, on E, is a darker minor sound, coloured by its flat second, the note just a semitone above home. That low second gives it a tense, Spanish or flamenco flavour, and it is a favourite in metal.
Lydian, on F, is a major sound lifted by its raised fourth. That one raised note gives it a floating, dreamy, slightly wonderstruck quality, which is part of why it turns up so much in film scores.
Mixolydian, on G, is a major sound with a flat seventh. It keeps the brightness of major but loosens the strong pull back home, which tends to give it a bluesy, rock, laid back feel.
Aeolian, on A, is the natural minor scale, the standard darker, more serious minor sound, and the reference point for minor the way Ionian is for major.
Locrian, on B, is the odd one out. Its flat second and flat fifth leave even its home chord diminished, so it sounds unstable and hard to rest on, which is why it is rarely used as a home base and mostly shows up in passing.
The trick to using a mode is to keep its home note as the tonal centre, so the ear treats that note, and not the parent major scale's tonic, as home. If you play the white keys but keep drifting back to C, you simply hear C major, whatever note you happened to start on.
So the real work is anchoring the modal root. Sit a bassline or a held drone on it, start and end your phrases on it, and lean on chords that contain it. Play a melody over a steady D in the bass, keep coming to rest on D, and the same white keys that spell C major now clearly sound like D Dorian, raised sixth and all. Take that anchor away and the mode collapses back into the ordinary major key its notes belong to.
This is why a mode is often described as a scale plus a decision about where home is. Nothing in the notes forces the point, so you have to make one note the centre and keep it there. Chords are the strongest anchor of all, since a progression built around the modal root keeps pinning the ear to it. Our guide to writing a chord progression covers how those chords are built and ordered, which is the natural next step once you have picked a mode to write in.
We built ARGISH to make this quick to hear. It is a self-playing synth locked to a key: pick a key and a mood and it keeps generating music that stays centred on that home note, so you can hear how a scale and its one centre note colour the mood without placing a single note yourself. It is a fast way to feel the difference a centre of gravity makes, by ear rather than on paper.
It runs free in your browser to try, and installs as AU, VST3, AAX or a standalone app when you want it inside your own sessions.
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