Wallingford Riegger, Dichotomy, Part 1 of 2.mpg @LendallPitts
Wallingford Riegger, Dichotomy, Part 1 of 2.mpg  @LendallPitts
Uploaded April 2010 | Updated September 2026, 3 days ago
Given the paucity of other sources, it seems likely that Wallingford Riegger learned much of what he knew of the twelve-tone method from his personal contact with Adolph Weiss. Riegger was already composing rugged, dissonant, atonal music in what was emerging as a shared ultramodern style, but he became increasingly interested in the possibilities of the twelve-tone method. In 1932, he completed his first piece that can reasonably be described as twelve-tone in significant respects (Dichotomy), and thereafter most of his instrumental music was serial at least in part.14

Dichotomy uses two series. In the published score, Riegger labels them A and B and identifies their occurrences and transformations (inversion, retrograde, retrograde-inversion) in the score (see Example 1.4).15 Series A contains eleven of the twelve notes (F is excluded). Series B contains thirteen notes (F♯ and B are excluded; F, G, and A are each stated twice). The last three notes of Series A (G, G♯, and A) return as the first three of Series B the two series otherwise share no segments. What they do share, however, are some of the characteristics of ultramodern melody: variety of interval and pitch (the latter, of course, endemic to serialism) and an avoidance of triadic outline or implication.

In the passage shown in Example 1.5, there are two distinct musical streams, one serial and the other not. Within the serial stream, we hear an ongoing duet, pitting either Series A or B against its own inversion. These are driving, craggy, widely spaced melodic lines. In the opening of the passage, Series B, played by the lower strings and bassoon, is heard against its inversion at T9I, played in the upper woodwinds. The two melodies are mirror images of each other in register this is a pitch, not a pitch-class inversion. Subsequently, the T1 transposition of A (in retrograde) is heard against the T9I inversion of A (also in retrograde). Again, the contours of the two melodies are largely mirror images, although this breaks down at the end of the passage, when each melody ruminates on its concluding four or five notes. Throughout these duets, and throughout the piece, Riegger maintains a concrete conception of the series as an actual melody with a specific contour. When the series is transposed or transformed (via inversion and or retrograde), its rhythms may change, but its registral shape generally remains the same. For Riegger, a series was primarily a line of pitches (not pitch classes), an actual melody with a determinate contour.

In the passage in Example 1.5, there is a second, non-serial stream. It consists of pairs of four- or six-note chords. These chords, sometimes preceded by ascending scales in parallel major sevenths, punctuate the passage, dividing the serial duet into discrete phrases. The chords are also extended into the driving rhythmic ostinato that runs through most of the passage. The resulting musical texture is about as far removed from Schoenbergs (and Weisss) neo-Baroque dances as possible, showing a much greater aesthetic kinship with works like Stravinskys Rite of Spring and Bartóks Allegro Barbaro. Apparently Riegger understood right from the beginning that the serial approach is not wedded to any specific style or texture; rather, it is a way of thinking about and organizing tones related only to one another (not to a tonic), permitting many different kinds of musical realizations.

The chords are identified with numbers in the score in Example 1.5. The first chord is a segment of the chromatic scale (which Riegger would have understood and described as a cluster chord) arranged as two whole tones a minor ninth apart. The first chord is then transposed up a semitone to produce the second chord. Taking the first two chords together, we have a five-note segment of the chromatic scale: C♯DD♯EF. The third and fourth chords transpose the first and second up by a perfect fourth (but not in register), producing another, non-overlapping segment of the chromatic scale: F♯GG♯AB♭. The fifth chord repeats the notes of the third chord, adjoining to them the lower whole tone of the first chord. The sixth chord transposes the fifth chord up by a semitone, and thus consists of the content of the fourth chord to which the lower whole tone of the second chord has been adjoined. The fifth and sixth chords together thus project almost the entire chromatic aggregate (only B, C, and F are missing). The chordal stream in this passage thus involves the dissonant major seventh (or minor ninth) as a harmonic interval and a preference for verticalized segments of the chromatic scale.

[Joseph N. Strauss]
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Wallingford Riegger, Dichotomy, Part 1 of 2.mpg

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