Comprehensive Study Guide on Seventh Chords and Roman Numeral Analysis in G Minor

Key and Scale Environment Analysis: g Minor

• Standard Key Identification Symbols     * In music theory notation, a lowercase letter followed by a colon (e.g., "g:") explicitly denotes a minor key.     * Conversely, an uppercase letter (e.g., "G:") would denote a Major key.     * The key of $g$ minor is the relative minor of $B\flat$ Major.
• Key Signature of $g$ Minor     * The key signature for $g$ minor consists of two flats: $B\flat$ and $E\flat$.
• Scale Degree Construction in Minor Keys     * Scale degrees are categorized by their position relative to the tonic ($i$).     * In harmonic minor (commonly used for chord construction), the seventh scale degree is raised, transforming the subtonic ($F$) into a leading tone ($F\sharp$).

Roman Numeral Analysis of Seventh Chords

• Definitions and Mechanics     * A seventh chord consists of a triad (root, third, and fifth) with an additional interval of a seventh above the root.     * Roman numerals indicate the scale degree of the root note within the specified key.     * Superscript numerals (e.g., "$7$") indicate the addition of the seventh interval to the triad.
• Analysis of Proposed Options in the Key of $g$ Minor     * The Supertonic Seventh ($ii^7$)         * The root of the supertonic is the second scale degree ($A$).         * In a natural minor key, the $ii$ chord is diminished ($A$, $C$, $E\flat$).         * As a seventh chord ($ii^{\text{\o}7}$ or $ii^7$), it is typically half-diminished in minor keys: $A$-$C$-$E\flat$-$G$.     * The Mediant Seventh ($III^7$)         * The root of the mediant is the third scale degree ($B\flat$).         * The triad is Major ($B\flat$, $D$, $F$).         * The seventh chord ($III^M7$ or $III^7$) is a Major-Major (Major seventh) chord: $B\flat$-$D$-$F$-$A$.     * The Submediant Seventh ($vi^7$)         * The root of the submediant is the sixth scale degree ($E\flat$).         * Note: In standard functional harmony in minor keys, the six chord is often represented as $\text{VI}$. The lowercase "$vi$ " implies a minor triad, which is non-diatonic to the natural minor scale ($VI$ is Major: $E\flat$-$G$-$B\flat$).         * If intended as the submediant seventh ($VI^7$), it consists of $E\flat$-$G$-$B\flat$-$D$.     * The Dominant Seventh ($V^7$)         * The root of the dominant is the fifth scale degree ($D$).         * In minor keys, the dominant triad is made Major via the raised leading tone ($F\sharp$) to create a strong pull to the tonic.         * The chord construction for $V^7$ in $g$ minor is: $D$-$F\sharp$-$A$-$C$.         * This creates a Major-minor seventh chord, also known as a Dominant Seventh.

Technical Interpretation of Question Parameters

• Scoring and Weighting     * The question is assigned a value of $2\,\text{pts}$.
• Objective     * The primary task is the identification of a specific chord based on its scale degree (Roman numeral) within the functional harmony of the specified key ($g$ minor).
• Contextual Clues     * The assignment requires matching a visual chord (implied as "the following chord") to its symbolic representation.     * Successful identification requires understanding whether the chord is built on the second ($ii$), third ($III$), sixth ($vi$), or fifth ($V$) scale degree of the $g$ minor scale.

Examination of Scale Degrees and Function

• Scale Degree I (Tonic): The home key, $G$.
• Scale Degree II (Supertonic): $A$. Functions often as a predominant.
• Scale Degree III (Mediant): $B\flat$. Represents the relative Major key.
• Scale Degree IV (Subdominant): $C$. A primary predominant function.
• Scale Degree V (Dominant): $D$. Provides harmonic tension and resolution to the tonic.
• Scale Degree VI (Submediant): $E\flat$.
• Scale Degree VII (Subtonic/Leading Tone): $F$ (natural minor) or $F\sharp$ (harmonic minor).