Publisher Desc.  This piece is a wonderful tool for teaching high school age students about 20th century, 12-tone structure, while at the same time teaching one of the Baroque forms, the passacaglia. The piece begins with a continual bass pattern and fugal entrances in the viola and violins. Each instrument uses the same tone row in its entirety, but doesn't rely on the other instruments (with a few exceptions) to finish the row. The piece develops much like a fugue with a recapitulation at the end.