. In root position, the root of the dominant seventh may be doubled and the fifth omitted with a figured bass of
voicing is called complete; the
voicing is called incomplete. When a complete root position dominant seventh resolves to a root position tonic chord, the tonic chord will be incomplete (fifth omitted). When an incomplete root position dominant seventh resolves to a tonic chord in root position, the tonic chord will be complete.
FIGURE 7.4: Complete and Incomplete Dominant Seventh Resolution Seventh and Resolution
When the dominant seventh chord appears in inversion a complete spelling will be used. The figured bass for a first inversion dominant seventh is
. It resolves to a 5 tonic chord. root position
FIGURE 7.5: First Inversion Dominant
When the dominant seventh chord appears in second inversion, it must pass between I and I6. This requires an irregular resolution. When it occurs between 16 and I, regular
resolution is required. Figured bass for a second inversion dominant seventh is
, abbreviated in major keys.
FIGURE 7.6: Second Inversion Dominant Seventh and Resolution
With the addition of a fourth note to a chord, a third inversion is possible. When the seventh of the dominant seventh is the lowest sounding note (Bass voice) the third
inversion is created. Figured bass for a third inversion dominant seventh is
or (sometimes 2).
This inversion will always resolve to a I6 but is still a regular resolution because the seventh in the Bass voice does resolve to the third of the tonic chord.
FIGURE 7.7: Third Inversion Dominant Seventh and Resolution
As indicated, the dominant seventh chord primarily progresses to the tonic chord. Occasionally, the dominant seventh chord may occur in a dominant seventh to subdominant to dominant seventh chord succession. When this occurs, the subdominant scale degree must be maintained as a common tone from chord to chord. This delays the resolution of the first seventh. The seventh ultimately resolves to the mediant scale degree.
FIGURE 7.8: Dominant Seventh to Subdominant to Dominant Seventh Chord Succession