Turnaround (music)

[1] The turnaround may lead back to this section either harmonically, as a chord progression, or melodically.

but here the major third makes it a secondary dominant leading to ii, i.e. V/ii.

Similar chromaticism and harmonic interest can be achieved by the use of a secondary dominant of V, for example V7/V–V7–I (that is, II7–V7–I), instead of ii–V–I.

The obvious chromatic movement is thorough; it is apparent in the roots (D–D♭–C), thirds (F–F–E; F is often used as a pedal tone), and fifths (A–A♭–G).

The half step downward motion of the roots of those chords, as seen in ii–♭II7–I, forms the familiar line cliché, arriving satisfyingly at the tonic.