Extended dominant chain: V/V (secondary dominant) → V → I. II⁷ is the dominant of the dominant, intensifying motion toward I.
The II⁷-V⁷-I cadence with 3 chords creates an extended harmonic motion. The character depends on context and surrounding harmony.
In the II⁷-V⁷-I cadence each chord serves a role: II⁷ — Secondary dominant (V/V), V⁷ — Dominant, I — Tonic. Double dominant resolution: D7→G7 and G7→C. Both steps are the strongest harmonic motions (fifth down + tritone). The accumulated "momentum" makes the final resolution to I especially convincing.
Tension builds through the stepwise motion. The nature of resolution is defined by the final chord of the cadence.
The II⁷-V⁷-I cadence is typical of major. Jazz endings, classical cadences before the final tonic, blues with extra flavor.
Common modifications: replacing one chord with an inversion, adding passing chords, rhythmic variation. Extending the cadence is achieved by adding preceding or following chords.
The II⁷-V⁷-I cadence is used for creating a particular harmonic color. Jazz endings, classical cadences before the final tonic, blues with extra flavor. In form, it can appear at the end of a verse, chorus, or section. When analyzing harmony, notice how the cadence affects the perception of form — it can emphasize structural boundaries or blur them.
On guitar, the II⁷-V⁷-I cadence can be played in open position (keys of C, G, D, A, E) or with barre chords (any key). Pay attention to voice leading — try to keep common tones in place while other voices move smoothly. This creates a more connected and professional sound. Also try playing the cadence on higher frets using partial barres and jazz voicings.