[Smt-talk] Addendum on Bach
Olli Väisälä
ovaisala at siba.fi
Mon Jan 25 12:02:51 PST 2010
Dear List,
The issue on the apparent contradiction between the I–V–IV–I key scheme
and the more or less non-syntactic nature of the same chord progression
may need some clarification.
First of all, this key scheme relates in several different ways with
design. In binary dance form it is typical that the first section
modulates from I to V and the second section from V to IV and
thereafter back to I. Besides IV, other keys (ii and vi especially)
often appear at this point; hence we can speak more generally of
I–V–x–I key succession, in which x can be IV, ii, or vi.
When considering harmonic hierarchy, on the other hand, it is important
to note that the return to I is usually preceded by a strong dominant
in the original key. In Schenkerian terms, the most common harmonic
structure for such I–V–IV–I key successions holds the IV as subordinate
to V, which stretches from the original tonicized V to the de-tonicized
V7 that prepares for the tonic return. Psychologically speaking, it is
easy to understand that the tonicized V cannot lead directly back to I,
but has to be de-tonicized, and an intervening IV offers an especially
effective way to do this by stressing the 4^ which cancels the #4^. In
terms of voice-leading, the IV helps to prepare the seventh of the V7.
The picture is, however, more complicated since I–V–IV–I also occurs in
other circumstances, like in the Prelude in E major from WTC1 and
Invention in F major. In these cases, the tonicized IV is not
subordinate to a surrounding V but functions as a genuine IV that leads
to the eventual cadential V.
There are still other possibilities when x = ii or vi.
If I may advertise another paper by myself, I would note that those
interested in the relationship between I–V–x–I key succession and
harmonic structure will find discussion on this topic in my recent
paper on Bach analysis in The Journal of Schenkerian Studies. (And to
correct my previous post, my Invention article is not actually in the
last issue of Spectrum as I said but in the preceding one [spring
2009]).
For more general treatment of the relationship between harmonic
structure and keys, see Schachter's excellent "Analysis by Key." (Music
Analysis 6/3 [1987], or Unfoldings, 134–160.)
Olli Väisälä
Sibelius Academy
ovaisala at siba.fi
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