Unresolved seventh · Rules
The seventh of a seventh chord falls by step in the next chord. Exceptions: the same chord in another position; in V7 → I⁶ the seventh may rise if the bass takes its resolution; a major seventh may rise to the root; and in V7 → IV it is held as the root of IV.
- Unresolved seventh: The seventh of a seventh chord falls by step in the next chord. Exceptions: the same chord in another position; in V7 → I⁶ the seventh may rise if the bass takes its resolution; a major seventh may rise to the root; and in V7 → IV it is held as the root of IV. (Piston, ch. 15, pp. 238–243; ch. 17, p. 266; ch. 23, p. 344)