Predominant seventh chords are four-note chords that typically function as transitional or preparatory chords between tonic and dominant harmonies.
Tonicization: Predominant seventh chords can be used for tonicization, temporarily emphasizing a different tonal center within a piece of music.
Cadence Progressions: Predominant seventh chords often appear in cadence progressions such as ii-V-I or IV-V-I, adding harmonic interest before resolving to the tonic.
Voice Leading: Understanding voice leading principles helps create smooth transitions between predominant seventh chords and other harmonies by minimizing melodic leaps.