Temporary Key Changes
Secondary dominants are like taking brief vacations to other keys without actually leaving home. By treating any chord as if it were a temporary tonic, you can create stronger resolutions and more sophisticated harmonic motion.
Stronger Resolutions
V7 → I is the strongest progression in music. Secondary dominants let you use this power anywhere.
Chromatic Color
Adds chromatic notes that aren't in the key, creating sophisticated harmonic colors.
How Secondary Dominants Work
The Basic Principle
Any chord can be preceded by its own dominant. In the key of C major:
- • Dm can be preceded by A7 (the V7 of D minor)
- • F can be preceded by C7 (the V7 of F major)
- • Am can be preceded by E7 (the V7 of A minor)
V/ii (A7)
Target: ii (Dm)
Resolution: A7 → Dm
Analysis: A7 contains C# which leads strongly to D
Usage: Very common - tonicizes the ii chord
- • "Autumn Leaves"
- • Many folk songs
V/iii (B7)
Target: iii (Em)
Resolution: B7 → Em
Analysis: B7 contains D# which leads to E
Usage: Less common but effective for minor flavor
- • "My Funny Valentine"
- • Jazz ballads
V/IV (C7)
Target: IV (F)
Resolution: C7 → F
Analysis: C7 contains Bb which leads to F
Usage: Common in country and folk
- • "Sweet Caroline"
- • Country standards
V/V (D7)
Target: V (G)
Resolution: D7 → G7
Analysis: D7 contains F# which leads to G
Usage: Extremely common - prepares the dominant
- • "I Got Rhythm"
- • Thousands of songs
V/vi (E7)
Target: vi (Am)
Resolution: E7 → Am
Analysis: E7 contains G# which leads to A
Usage: Very popular for dramatic effect
- • "House of the Rising Sun"
- • "California Dreamin'"
Secondary Dominants in Action
Circle of Fifths with Secondary Dominants
Jazz, Advanced HarmonyWithout secondary dominants: C - F - Bb - Eb - Ab - Db - Gb - B - E - A - D - G - C
With secondary dominants: C - C7 - F - F7 - Bb - Bb7 - Eb...
Analysis: I - V/IV - IV - V/bVII - bVII...
Effect: Each major chord becomes a dominant 7th leading to the next chord down a 5th
Pop Song with V/vi
Pop, Folk, CountryWithout secondary dominants: C - Am - F - G
With secondary dominants: C - E7 - Am - F - G
Analysis: I - V/vi - vi - IV - V
Effect: E7 strongly tonicizes Am, making it feel temporarily like a tonic
Jazz ii-V with V/V
Jazz, Sophisticated PopWithout secondary dominants: Dm7 - G7 - C
With secondary dominants: Dm7 - D7 - G7 - C
Analysis: ii7 - V/V - V7 - I
Effect: D7 prepares G7 more strongly than simple ii7-V7 motion
Country/Folk IV preparation
Country, Folk, BluegrassWithout secondary dominants: C - F - G - C
With secondary dominants: C - C7 - F - G - C
Analysis: I - V/IV - IV - V - I
Effect: C7 makes the move to F feel like a strong resolution
Advanced Secondary Dominant Concepts
Leading Tone Creation
Secondary dominants create leading tones to non-tonic chords
Example: In C major, D7 (V/V) creates F# which leads to G
Application: Any time you want to strongly emphasize a target chord
Temporary Tonicization
The target chord temporarily feels like a new tonic
Example: E7 → Am makes Am feel like "home" momentarily
Application: Creating key centers within a progression
Chromatic Voice Leading
Secondary dominants often create chromatic bass lines
Example: C - C7 - F creates bass line C - C - F with chromatic harmony
Application: Smooth, sophisticated harmonic motion
Circle of Fifths Motion
Chain secondary dominants for continuous forward motion
Example: A7 - D7 - G7 - C (V/ii - V/V - V - I)
Application: Building harmonic momentum and sophistication
Analysis: "Sweet Caroline" by Neil Diamond
Secondary Dominants in Popular Music
Progression: C - C7 - F - G - C
Analysis: I - V/IV - IV - V - I (in C major)
- • C7 contains Bb (not in C major)
- • Bb strongly wants to resolve down to A
- • But it resolves to F instead, creating satisfaction
- • Makes F feel like a temporary "home"
Why It's Effective
- • Simple but sophisticated harmonic motion
- • Creates forward momentum to the IV chord
- • Adds just enough sophistication without complexity
- • Perfect for sing-along accessibility
- • Emotional Effect: Confident → Slightly uncertain → Resolved satisfaction
Essential Secondary Dominant Patterns
Popular Music Patterns
- • I - V/vi - vi - IV: C - E7 - Am - F (Makes vi feel like temporary tonic)
- • I - V/IV - IV - V: C - C7 - F - G (Country/folk progression)
- • vi - V/V - V - I: Am - D7 - G - C (Strong cadential motion)
Jazz/Advanced Patterns
- • ii - V/V - V - I: Dm - D7 - G - C (Enhanced ii-V-I progression)
- • V/ii - ii - V - I: A7 - Dm - G - C (Extended ii-V-I approach)
- • Circle of Fifths: A7-D7-G7-C (Chain of secondary dominants)