Getting Started
Beyond the familiar sounds of the major and minor scales lies a richer palette of melodic color. This chapter introduces the modes, a set of seven distinct scales derived from a single parent scale. Understanding modes expands your analytical toolkit, allowing you to identify and describe the unique melodic character of music that operates outside the standard major-minor tonal system.
What You Should Be Able to Do
Identify each of the seven modes by name from a notated musical excerpt.
Aurally distinguish between melodies based on major, minor, and modal scales.
Construct any of the seven modes beginning on a specified pitch.
Define the characteristic pitch that distinguishes each mode from a parallel major or minor scale.
Analyze melodic passages to determine their underlying modal scale.
Key Concepts & Analysis
The analysis of modes centers on scale construction and the identification of characteristic pitches. Unlike functional harmony, which deals with chord progressions, modal analysis focuses on the specific collection of notes used to create a melody and establish a tonal center.
What is a Mode?
A scale is an ordered collection of pitches that serves as the foundational melodic and harmonic material for a piece of music. A mode is a specific permutation or rotation of a parent scale. The seven modes discussed here, often called the diatonic modes, are all derived from the same seven pitch classes that form the major scale. Each mode is created by starting on a different degree of the major scale and using the same collection of notes.
For example, using the pitches of the C major scale (C, D, E, F, G, A, B):
Starting on C (^1) gives the Ionian mode (the major scale).
Starting on D (^2) gives the Dorian mode.
Starting on E (^3) gives the Phrygian mode, and so on.
Each mode has a unique sequence of whole and half steps, resulting in a distinct melodic sound and character.
Identifying Modes by Characteristic Pitch
While modes can be derived by rotating a parent major scale, the most efficient method for identification is to compare the mode to its parallel major or minor scale. A parallel scale is one that shares the same starting note, or tonic. For example, C major and c minor are parallel scales. By comparing a mode to its parallel major or minor counterpart, a single "characteristic pitch" often emerges that defines its unique sound.
The Major Modes
These three modes have a major-quality tonic triad (a major third above the tonic). They are compared to the parallel major scale.
Ionian: This is identical to the standard major scale. It has no characteristic pitch, as it is the baseline for comparison.
Lydian: This mode is a major scale with a raised fourth scale degree (^4). This interval, an augmented fourth above the tonic, gives the mode a uniquely bright and open sound.
Mixolydian: This mode is a major scale with a lowered seventh scale degree (^7). This interval, a minor seventh above the tonic, is its defining feature and is common in blues, rock, and folk music.
The Minor Modes
These three modes have a minor-quality tonic triad (a minor third above the tonic). They are compared to the parallel natural minor scale.
Aeolian: This is identical to the standard natural minor scale. It serves as the baseline for comparison among the minor modes.
Dorian: This mode is a natural minor scale with a raised sixth scale degree (^6). This major sixth above the tonic gives the mode a sound that is minor but brighter or "lighter" than Aeolian.
Phrygian: This mode is a natural minor scale with a lowered second scale degree (^2). This interval, a minor second above the tonic, is highly distinctive and creates a dark, tense quality.
The Diminished Mode
- Locrian: This mode is unique in that its tonic triad is diminished (a minor third and a diminished fifth above the tonic). It can be compared to a natural minor scale with both a lowered second (^2) and a lowered fifth (^5) scale degree. It is the darkest of all the modes and is used less frequently in melodic writing due to the instability of its tonic triad.
Data & Organization Tools
This table summarizes the seven diatonic modes, their quality, and the characteristic pitches that distinguish them from their parallel major or minor scales.
| Mode | Starts On (in Major) | Quality | Characteristic Pitch(es) |
|---|---|---|---|
| Ionian | ^1 | Major | (Same as Major Scale) |
| Dorian | ^2 | minor | Raised ^6 (vs. Natural Minor) |
| Phrygian | ^3 | minor | Lowered ^2 (vs. Natural Minor) |
| Lydian | ^4 | Major | Raised ^4 (vs. Major) |
| Mixolydian | ^5 | Major | Lowered ^7 (vs. Major) |
| Aeolian | ^6 | minor | (Same as Natural Minor) |
| Locrian | ^7 | diminished | Lowered ^2 and Lowered ^5 |
Evidence Bank
Ionian Mode: The modern major scale (e.g., C–D–E–F–G–A–B). It functions as the standard reference for major-key tonality.
Dorian Mode: A minor-quality mode with a characteristic raised ^6. It sounds minor but with a brighter inflection than natural minor.
Phrygian Mode: A minor-quality mode with a characteristic lowered ^2. The half step between ^1 and ^2 gives it a distinctively dark and Spanish-like flavor.
Lydian Mode: A major-quality mode with a characteristic raised ^4. The augmented fourth above the tonic creates a bright, ethereal, and open sound.
Mixolydian Mode: A major-quality mode with a characteristic lowered ^7. It has a major-key sound but with a blues or folk inflection due to the lack of a leading tone.
Aeolian Mode: The modern natural minor scale (e.g., A–B–C–D–E–F–G). It functions as the standard reference for minor-key tonality.
Locrian Mode: A diminished-quality mode with a lowered ^2 and lowered ^5. Its unstable tonic triad makes it the least common mode in tonal music.
Skill Snapshots
Construction: To build E Lydian, first construct the E major scale (E–F#–G#–A–B–C#–D#). Then, apply the Lydian formula by raising the fourth scale degree: E–F#–G#–A#–B–C#–D#.
Aural Identification: A melody in a minor key that features a prominent raised ^6 (e.g., in G minor, an E-natural instead of an E-flat) is likely in the Dorian mode. This "lift" on the sixth degree is a key aural cue.
Notational Analysis: A melodic passage with a key signature of one sharp that is clearly centered on the pitch A is in A Dorian. The F# is expected for the key signature, but the presence of G-natural (the lowered ^7 relative to A major) and the C# (the raised ^6 relative to a minor) confirms its Dorian identity.
Common Misconceptions & Clarifications
Relative vs. Parallel Modes: C Ionian, D Dorian, and E Phrygian are relative modes because they share the same key signature (no sharps or flats). C Ionian, C Dorian, and C Phrygian are parallel modes because they share the same tonic. Analysis focuses on the parallel relationship to identify characteristic pitches.
Key Signature as a Clue, Not a Rule: A key signature only indicates the pitch collection being used. The true mode is determined by the pitch that functions as the tonal center or tonic. A signature of one flat could imply F major, d minor, G Dorian, A Phrygian, etc.
Dorian vs. Melodic Minor: The Dorian mode has a fixed raised ^6 and lowered ^7. The melodic minor scale is variable, typically using a raised ^6 and raised ^7 in ascent and reverting to natural minor in descent.
Mixolydian vs. Dominant: The Mixolydian scale has the same notes as a dominant seventh chord built on the tonic (root, M3, P5, m7). This makes it a very stable-sounding mode often used in folk and popular music.
Summary
The seven diatonic modes—Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian—represent a fundamental expansion of the melodic resources available beyond the major-minor system. Each mode is a unique rotation of the major scale's pitch collection, resulting in a distinct sonic character. While Ionian and Aeolian are identical to the familiar major and natural minor scales, the other five modes offer fresh expressive possibilities. The key to identifying a mode in a melodic passage is to first determine its tonic and then compare its scale structure to the parallel major or minor scale, isolating the characteristic pitch that defines its unique sound.