built almost exclusively from the interval of a fourth," and his later reference to a "virtual fourth chord" miss the salient point of the first half of this song: it is built entirely around overlapping transpositions of the  trichord
(for example, C-C#-F # ).
If fluent in Babbitt's earlier practices, one would expect the partitions to be symmetrical, and for each hexachord and trichord
to share similar set classes and be combinatorial and complementary with one another.
The second feature missing in Alegant's account is the minor triad for P forms or major triad for I forms that occurs as the final trichord
in Dallapiccola's row.
An element of Webern's style that is much in evidence in these songs, and which is an important tool in learning and listening to them, is the trichord
In the early 1960s, State departments of transportation (DOTs) began using aluminum trichord
overhead structures to support signs along our Nation's highways.
8) Jonathan Bernard relates this function to the composer's "deliberately global" use of smaller pitch sets--for instance, the systematic inclusion of all possible trichord
types in the Piano Concerto, all possible tetrachord types in String Quartet No.
Apart from the motifs constructed in this way, roughly in the middle of the whole composition, in the 7th Leaf, we find another motif that differs from the earlier ones primarily by its movement within a single trichord
(B, C, C sharp).
Blocks 1, 2, 5 and 6 reassemble the accompaniment's reiterated trichord
in close position in a higher register, and blocks 3 and 7 add a drone bass; but in none of those passages does one pitch class assert superiority.
Under a Public-Private Partnership with the Virginia Department of Transportation, Trichord
has deployed real-time traffic sensors in Northern Virginia and augments data from those sensors with data from VDOT.
In fact, an instance of this trichord
type can be formed with every pitch class of an octatonic collection.
Shapey lets the opening trichord
"anchor" gesture (E, G, A) drop out earlier in section 6 (page 9, system 4 to page 10, system 1), and simplifies and condenses the gestures (page 9, system 4, compared to score page 1, system 2).
While PEMS was developed specifically as an evacuation tool, the Coliseum Central Project deployment is a classic example of how this system can serve the day-to-day needs of motorists and transportation officials between emergencies," said Craig Franklin, President of Trichord