Nones (Berio)

[1] The purely instrumental piece is predominantly punctual in texture[2] and formally consists of an approximate arch created by "theme" and variations.

The tone row used was nontraditional in construction in several respects including number of pitches and consistent emphasis on intervals of major and minor thirds.

[citation needed] A note in Berio's sketches confirms that he consciously derived it from the trichordal cell of Webern's Concerto, Op.

Its combination of major and minor thirds is also prevalent in Stravinsky, who had been a strong influence on Berio up to this time.

The row in fact includes four of the six possible permutations of this core trichord, guaranteeing a permanent atonal equilibrium.