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Kyle Adams A New Theory of Chromaticism
diatonicism, which refers to any passage that uses only diatonic sonorities, and
suspended diatonicism, which consists of any passage for which it is impossible to
determine the governing tonal system. The latter usually occurs because the
accumulation of semitones makes it impossible to arrive at a diatonic basis for
the passage. These endpoints are what Carl Dahlhaus, following Max Weber,
refers to as ideal types;
18
that is, they are categories that exist in principle
but may have no occurrences in actual music. Pure diatonicism, for example,
rarely exists for long spans of time, despite the fact that a single renaissance
work may be notated without accidentals from beginning to end. If unnotated
musica ficta is considered to be a given feature of the musical surface, as I argue
it should (see Appendix B), then there is hardly a renaissance work that does
not exhibit chromaticism as I have defined it. Likewise, although many musi-
cal examples verge on suspended diatonicism, this ideal type does not seem
to exist in practice. Every passage I have examined, no matter how densely
chromatic, has features that give it some diatonic context.
Between pure diatonicism and suspended diatonicism are three other
chromatic techniques identifiable in music from this period. Nonessential chro-
maticism has already been defined. Note that it appears under the general
category of diatonicism because nonessential chromatic tones are alterations
of diatonic tones and can be removed to reveal a passage of pure diaton icism.
Essential chromaticism has also already been defined, and it is the first type of
chromaticism along the continuum. Essential chromatic tones will nearly
always signal a move into a tonal system in which they are diatonic. Unlike
true diatonic tones, however, they are chromatic in relation to the system that
came before. Juxtaposed diatonicism consists of the placement of two different
tonal systems alongside one another using direct chromaticism.
Figure 1 is not a line in which every chromatic work has a position rela-
tive to every other and one can plot precisely the relative degree of chromati-
cism of any work. The categories and techniques of chromaticism represented
on it can coexist in the same work, or even in a single passage. Nor is the
continuum the most accurate possible graphic representation of the catego-
ries it contains; for example, nonessential chromaticism can exist within jux-
taposed diatonicism. Nonetheless, it is a useful way to schematize chromatic
techniques in the repertoire under consideration.
The analytical method: Diatonic reduction
Diatonic reduction is a method of distinguishing among various levels of chro-
maticism in a given passage. It consists of the removal of nonessential chro-
matic alterations to reveal the tonal system(s) underlying a given passage.
18 Weber, as quoted in Gossett 1989, describes an “ideal
type” as follows: “An ideal type is formed . . . by the synthe-
sis of a great many diffuse, discrete, more or less present
and occasionally absent concrete individual phenomena,
which are arranged according to those one-sidedly empha-
sized viewpoints into a unified analytical construct. In its
conceptual purity, this mental construct cannot be found
empirically anywhere in reality” (51).