1.4 Major Scales and Scale Degrees

A major scale is seven pitches arranged by a fixed pattern of whole and half steps: W W H W W W H. Every pitch in that scale has a scale degree number (1 through 7) and a scale degree name like tonic, dominant, or leading tone, which tells you how that pitch functions relative to the central pitch.

Why This Matters for the AP Music Theory Exam

Major scales and scale degrees show up everywhere in AP Music Theory because almost every melody and chord you analyze is built from a scale. Once you can quickly identify the tonic and label each pitch by number or name, you can recognize patterns in notated music and connect what you hear to what you see.

This topic supports several skills you build all year:

• Identifying major scales in performed and notated music.
• Naming a pitch's function relative to a tonic using scale degree names or numbers.
• Reading and tracking melodies in score analysis.
• Building a labeling system (numbers or solfège) that helps with melodic dictation and sight-singing later on.

When a listening question asks you to identify or notate pitches, you are given a starting pitch or reference point, so you work from relationships rather than absolute pitch.

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Key Takeaways

• The major scale pattern is whole-whole-half-whole-whole-whole-half (W-W-H-W-W-W-H), ascending or descending.
• The first pitch of the scale is the tonic, and the scale ends on the same letter name one octave higher or lower.
• Scale degrees can be labeled by number (1 through 7) or by name: tonic, supertonic, mediant, subdominant, dominant, submediant, and leading tone (subtonic in some contexts).
• Pitches inside the scale are diatonic; pitches outside it are chromatic.
• A consistent labeling system (scale degree numbers or movable-do solfège) helps you recognize how pitches relate to the tonic.

Major Scales

When you arrange pitches in a specific ascending or descending order, you get a scale. Western music is built largely on major and minor scales, though many other scale types exist around the world.

The major scale is often described as bright or cheerful, and it appears in classical, pop, rock, and jazz. Mood labels are not something you need for the exam, but knowing them can be useful as a musician. The major scale is also called the diatonic scale because it is made of five whole steps and two half steps, sometimes called tones and semitones.

Building a Major Scale

Every major scale follows the same pattern of half and whole steps, no matter which pitch you start on:

W - W - H - W - W - W - H

Here is what that looks like starting on C:

A C major scale starts on C and ends on C. A scale always ends on the same letter name an octave higher or lower. An octave is the distance from a pitch to the next pitch of the same letter name. We usually write major scales using capital letters.

You do not have to memorize the W-W-H-W-W-W-H pattern in isolation. The C major scale uses no sharps or flats, so you can derive the pattern from it, or you can learn which sharps or flats each major scale uses. Either way, the spacing stays the same.

Diatonic vs. Chromatic

When a passage uses the pitches of a major scale and treats that scale's first pitch as the central pitch, the music is "in" that key. Pitches that belong to the scale are diatonic; pitches that do not belong are chromatic. For example, in C major, D is diatonic and D♯ is chromatic.

Major Scale Degrees

The starting pitch of a scale is the tonic, the central pitch that everything else relates to. Each pitch in the scale is a scale degree, and each degree has both a number and a name that signals its role in the key.

Here are the major scale degrees:

1. Tonic (degree 1): the starting pitch and the center of the key.
2. Supertonic (degree 2): a whole step above the tonic.
3. Mediant (degree 3): the pitch midway between tonic and dominant.
4. Subdominant (degree 4): a fifth below the tonic, and just below the dominant.
5. Dominant (degree 5): a fifth above the tonic, with a strong pull back toward tonic.
6. Submediant (degree 6): below the upper tonic and above the dominant.
7. Leading tone (degree 7): a half step below the tonic, with a strong pull up to it.

After the leading tone, the scale arrives back at the tonic an octave higher, which feels like completion.

These names describe how each pitch functions relative to the tonic. The tonic feels like home, the dominant creates tension that wants to resolve to tonic, and the leading tone pulls strongly up to the tonic.

Numbers, Names, and Solfège

You can label scale degrees three common ways, and being fluent with at least one will pay off:

• Numbers: 1 through 7, with degree 1 as tonic.
• Names: tonic, supertonic, mediant, subdominant, dominant, submediant, leading tone.
• Movable-do solfège: do, re, mi, fa, sol, la, ti, with do as tonic in any major key.

Picking one system early and using it consistently helps you hear and read pitches as relationships to the tonic rather than as isolated notes.

How to Use This on the AP Music Theory Exam

Score Analysis

When you read notated music, find the tonic first, then label pitches by scale degree. This lets you see melodic patterns quickly and track how a melody moves toward or away from the tonic.

Listening

For aural questions, you are given a starting pitch or reference point. Use it to anchor the tonic, then hear each new pitch as a scale degree above or below it. Recognizing the pull of the leading tone up to tonic or the dominant back to tonic helps you identify what you hear.

Sight-Singing

A scale degree or solfège system gives you a reliable way to sing intervals from the tonic. Practicing the major scale up and down with numbers or solfège builds the recognition you need to sing unfamiliar melodies.

Common Trap

Spelling a scale with the wrong letter names is a frequent error. A major scale uses each letter name once, in order, so an F major scale uses B♭, not A♯, even though they sound the same. Choose the spelling that keeps the letters in sequence.

Building Major Scales with the Circle of Fifths

There is a quick way to recall which sharps or flats each major scale uses without counting the W-W-H-W-W-W-H pattern every time.

For sharp keys, start with C major (no sharps). G major has one sharp (F♯). Go up a fifth to D major, which has two sharps (F♯, C♯). Up another fifth gives A major with three sharps (F♯, C♯, G♯), and so on. If you are handed a sharp key signature, the tonic is a half step above the last sharp. The last sharp in D major is C♯, and a half step above C♯ is D.

For flat keys, start again with C major (no flats). F major has one flat (B♭). Going down by fifths, B♭ major has two flats (B♭, E♭), then E♭ major has three flats (B♭, E♭, A♭). If you are handed a flat key signature, the tonic is the second-to-last flat. With B♭, E♭, and A♭, the second-to-last flat is E♭, so the key is E♭ major.

Going up or down by fifths eventually cycles back to where you started. That pattern is the circle of fifths, often drawn as a clock-like circle.

You do not have to memorize the full circle right now, but keep the image in mind. You will build on it as you connect scales to keys and key signatures in the next topic.

Quick check: Can you name the pitches of the E major scale? How many sharps or flats does it use? Can you sing it back in your vocal range?

Common Misconceptions

• A major scale is not just "white keys." Only C major uses no sharps or flats. Every other major scale follows the same W-W-H-W-W-W-H pattern, which requires sharps or flats to stay in tune.
• Scale degree names are not random labels. Each name reflects how a pitch functions relative to the tonic, so the dominant and leading tone carry a stronger pull toward tonic than other degrees.
• Major does not mean "happy" and minor does not mean "sad." That is a loose generalization, not a rule, and you do not need mood labels to identify a scale.
• Enharmonic spelling matters. F♯ and G♭ sound the same but belong to different key spellings, so always spell a scale with each letter name used once in order.
• You do not need absolute pitch for listening questions. A starting pitch or reference is always provided, so you work from relationships to the tonic, not from naming pitches out of thin air.

Related AP Music Theory Guides

• 1.1 Pitch and Pitch Notation
• 1.3 Half Steps and Whole Steps
• 1.2 Rhythmic Values
• 1.5 Major Keys and Key Signatures
• 1.6 Simple and Compound Beat Division
• 1.7 Meter and Time Signature