79
CHAPTER 15
Other Diatonic Seventh Chords
The unit on diatonic seventh chords concludes with this chapter devoted to all of the diatonic seventh chords other
than the V7. The most commonly encountered of these are the ii7 (iiø7) and the viiø7 (viio7) chords. The remaining
diatonic seventh chords are presented in the order shown on p. 237 of the textbook, beginning with IVM7 (iv7). They
are not found as frequently as are the seventh chords previously discussed, their most natural environment probably
being the circle–of–fifths sequence.
The variability of scale degrees § and ¶ in minor results in a large number of possible diatonic seventh chords, most
of which are encountered rarely, if ever, in tonal music. However, special cases that should not be overlooked in
classroom discussion include the IVe (major–minor seventh) and the #vi-e, both of which occur as passing chords in
the minor mode. These are frequently found in Bach’s chorale harmonizations, somewhat less frequently elsewhere
in the literature.
The chapter concludes with a discussion of voice leading procedures in circle–of–fifths progressions of seventh
chords. Following the usual admonition to alternate complete with incomplete chords in a root position progression
of this type, illustrations are provided of the very commonly encountered sequences that involve inverted seventh
chords.
Answers to Selected Exercises
Exercise 15-1
A.