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The problem it solves
Naming notes by their absolute name (C, E…) hides the function they have within the key. Thinking in degrees reveals the hierarchy, lets you transpose ideas to any key, and is the basis of harmonic analysis.
Detailed theory
Key idea
Each degree has a number (1-7) and a name: 1 tonic, 2 supertonic, 3 mediant, 4 subdominant, 5 dominant, 6 submediant, 7 leading tone.
The tonic (1), the dominant (5) and the subdominant (4) are the structural pillars of the key.
Understand it
We number the seven notes of the major scale from 1 to 7 according to their position relative to the tonic. Each number also has a functional name describing its role: 1 is the tonic (the centre and the rest), 2 the supertonic, 3 the mediant, 4 the subdominant, 5 the dominant, 6 the submediant or superdominant, and 7 the leading tone.
The names are not arbitrary: they locate each note relative to the tonic. The dominant (5) is the degree with the most drive after the tonic, and the subdominant (4) acts as its counterweight; both, together with the tonic, are the three pillars on which the key is organised.
The leading tone (7) deserves special attention: it sits exactly a semitone below the tonic and therefore pushes strongly toward it. It is the degree that makes a major scale "want" to close by rising to the tonic.
An analogy: degrees are like the job titles in a team, not the proper names of the people. The tonic is the one in charge, the dominant the right hand, the leading tone the one knocking at the tonic's door. If you switch teams (keys), the titles stay even though the people (the notes) are different.
And this is the practical key: degrees are relative to the tonic. The note G is the dominant (degree 5) in C major, but it is the tonic (degree 1) in G major. Thinking in degrees, not in fixed names, is what lets you transpose melodies and analyse chords in any key.
Staff & keyboard
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The three degrees with most functional weight in C major: tonic (C), dominant (G) and leading tone (B).
How to recognise it
How it's written
Degrees are written with numbers (1 to 7) or with the functional name (tonic, dominant, leading tone…); in harmonic analysis Roman numerals are often used (I, V, VII). On the staff, count from the tonic to know which degree each note is.
How it feels
Play the scale and stop on each degree, always returning to the tonic: you will notice that some rest and others pull. The leading tone, just below the tonic, is the one that feels most unstable and most eager to resolve upward.
Common mistake
Confusing the degree with the absolute name of the note: G is not "always the dominant", it only is in C major; in G major it is the tonic.
Forgetting that the leading tone is a semitone below the tonic and treating it as just another stable degree.
Try it
In C major, name each note by its degree and function: C=1 tonic, G=5 dominant, B=7 leading tone.
Change tonic to G major and check that now G is degree 1 and D the dominant: the degrees have moved with the tonic.
On the instrument
Staff & keyboard
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The degrees of C major numbered 1-8. The tonic (C), the dominant (G) and the leading tone (B) stand out for their role.
Interval distance
B-C: the leading tone (7) a semitone from the tonic (8). This closeness is what pushes it to resolve upward.
Reference table
| Degree | Feel |
|---|---|
| I | Total rest, stability (the "home") |
| II | Mild tension, passing |
| III | Soft; gives the major or minor colour |
| IV | Openness; gently pulls away and prepares tension |
| V | Strongest tension; wants to resolve to I |
| VI | Relative rest, softer colour |
| VII | Strong tension (leading tone); pulls up to I a semitone above |
Each degree of the major scale and the feel it brings relative to the tonic: some rest and some pull.
Where it's used
- Quick transposition
- Singing or playing a melody in any key by thinking in degree relationships, not fixed notes.
- Harmonic analysis
- Understanding how chords are built on each functional degree (I, IV, V…) of the scale.
- Feeling the leading tone
- Recognising how the seventh degree, a semitone from the tonic, pushes the melody to resolve upward.
Examples
Chord progression
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I-V-I in C major: the tonic (I) rests, the dominant (V) pulls and returns to the tonic. Degrees 1 and 5 in action.
Exercises
Degree dictation — basic
Short melodic dictation in C major: listen to the melody and write its notes and degrees.
Complete 5 attempts · 70% accuracy to pass
Degree dictation — intermediate
Melodic dictation in C major with leaps: recognise and write the degrees of the melody.
Complete 8 attempts · 70% accuracy to pass
Degree dictation — advanced
Longer melodic dictation in C major: write the whole melody and its degrees.
Complete 10 attempts · 70% accuracy to pass
Mini test
Check that you've got it.
0/8 answeredQuestion 1/8
What functional name does the first degree of the major scale get?