Which term describes Arnold Schoenberg's influential method of composition using all twelve tones?

• A. Romantic era
• B. 12-tone music
• C. Polyphonic textures
• D. Serialism

Answer: (B)

The key idea is arranging every one of the twelve chromatic pitches in a fixed sequence and using that sequence to generate the music. In 12-tone music, a composer creates a tone row that includes each pitch class exactly once, then builds melodies, chords, and structures from that row. The row can appear in its original order, or be transformed in various ways—such as inversion (flipping the intervals), retrograde (playing it backward), or retrograde-inversion, and it can be transposed to start on different pitches. This systematic approach prevents any single pitch from dominating the piece, giving rise to the atonal sound associated with Schoenberg’s method.

Serialism is a broader concept that extends the same idea to organizing other musical elements—rhythm, dynamics, and timbre—in addition to pitch. But the specific term for using all twelve tones in a row to control musical material is 12-tone music.