Unit Big Picture
This unit establishes the foundational grammar of Western harmony. Moving beyond the identification of individual chords, we explore how chords connect to form logical progressions with clear functions. We will build music from its two-voice skeleton (soprano-bass) into a full four-voice texture, learning the conventions that guide smooth melodic motion. These skills enable the analysis and creation of musical phrases, which are punctuated by standard harmonic formulas called cadences.
Core Threads
Thread 1: Functional Harmony & Cadences
Chord Jobs: Chords are categorized by their function within a key—Tonic (rest), Dominant (tension), and Predominant (transition). This system creates a predictable sense of departure and return.
Harmonic Punctuation: Cadences, which are specific two-chord patterns, act like commas and periods in language. They define the end of a musical phrase and create varying degrees of closure.
Thread 2: Voice-Leading & Texture
From Skeleton to Body: We expand the essential two-voice soprano-bass counterpoint into a four-voice SATB texture. This introduces principles of spacing and motion that ensure each voice is clear and singable.
Controlled Dissonance: The introduction of the chordal seventh (especially on the dominant) adds a new level of tension. Its required, stepwise resolution intensifies the harmonic drive toward the tonic.
Concept Progression
| Step | Concept | Builds On | Why It Matters |
|---|---|---|---|
| 1 | Soprano-Bass Counterpoint | Interval recognition | Establishes the essential outer-voice framework that governs harmony. |
| 2 | SATB Voice Leading | Triad construction | Fills the S-B framework to create a complete, standard harmonic texture. |
| 3 | Functional Progression | Roman numeral analysis | Explains the logic behind common chord progressions (T–PD–D–T). |
| 4 | Cadences | Functional Progression | Provides conclusive patterns that define phrases and sections. |
| 5 | Dominant Seventh Chords | Dissonance/Resolution | Adds a powerful tool for creating tension that demands resolution to the tonic. |
Turning Points
| New Tool Introduced | What It Enables | Why It Mattered |
|---|---|---|
| The Soprano-Bass Framework | Structuring harmony around two primary melodic lines. | It simplifies complex textures to their essential contrapuntal skeleton. |
| Functional Harmony (T/PD/D) | Classifying chords by their grammatical role, not just their root. | It explains why certain progressions sound logical and goal-oriented. |
| The Dominant Seventh Chord | Creating stronger, more directed harmonic tension. | It introduces controlled dissonance as a core tool for driving music forward. |
Unit Evidence Bank
SATB Texture: A four-voice texture (Soprano, Alto, Tenor, Bass) that is the standard for common-practice part-writing.
Voice Leading: The process of connecting chords by moving individual melodic lines (voices) smoothly, typically by step or by holding common tones.
Functional Harmony: The system where chords are categorized by their role: Tonic (T) for rest, Dominant (D) for tension, and Predominant (PD) to prepare the dominant.
Harmonic Progression: A sequence of chords. The most common path is Tonic → Predominant → Dominant → Tonic.
Cadence: A two-chord formula at the end of a phrase that provides punctuation. The two main types are authentic (V-I) and half (ends on V).
Parallel Motion: When two or more voices move in the same direction by the same interval. Parallel fifths and octaves are conventionally avoided.
Chordal Seventh: The dissonant note a seventh above the root of a chord. It almost always resolves down by step in the following chord.
Tendency Tone: A note that has a strong melodic pull toward a specific resolution. The leading tone (ti) resolves to the tonic (do).
Topic Navigator
| Topic Title | What This Adds (≤10 words) |
|---|---|
| 4.1: Soprano-Bass Counterpoint | Establishes the outer-voice framework for all harmony. |
| 4.2: SATB Voice Leading | Fills in inner voices, creating standard four-part texture. |
| 4.3: Harmonic Progression, Functional Harmony, and Cadences | Introduces chord function (T-PD-D) and phrase-ending formulas. |
| 4.4: Voice Leading with Seventh Chords | Adds the V7 chord and its required dissonant resolution. |
| 4.5: Voice Leading with Seventh Chords in Inversions | Expands V7 use for creating smoother, more melodic bass lines. |
Exam Skills Focus
Functional: A predominant chord (e.g., ii) creates forward momentum by leading to the dominant.
Voice-Leading: Holding common tones between chords is the simplest way to ensure smooth connections.
Aural: Hearing a phrase end on a V chord indicates an inconclusive half cadence.
Common Misconceptions & Clarifications
Misconception: Voice-leading "rules" are arbitrary and must always be followed.
- Clarification: They are stylistic conventions derived from vocal practice to ensure melodic independence and clarity. Master composers bend them for expressive effect.
Misconception: Any chord can follow any other chord.
- Clarification: While technically possible, common-practice harmony follows predictable functional paths (e.g., T→PD→D→T) that create listener expectation and coherence.
Misconception: A cadence is just the final chord of a phrase.
- Clarification: A cadence is a two-chord progression (e.g., V–I). Both chords are essential to create the sense of punctuation.
Summary
This unit provides the essential grammar for tonal music. We learn to construct a full four-part texture from a simple two-voice frame, following conventions that ensure clarity and smoothness. By assigning functional roles—Tonic, Predominant, and Dominant—to chords, we can understand why progressions feel logical and goal-oriented. This knowledge allows us to analyze and create musical phrases, which are defined by cadences. The introduction of the dominant seventh chord adds a crucial element of tension and resolution, powering the engine of harmonic motion.