## 2.8 Contemporary music

From the beginning of the 20th Century there has been a massive expansion of compositional style and technique. New harmonic and rhythmic developments, an expansion of the pitch spectrum and the development of a wide range of new instrumental techniques have been accompanied by a parallel evolution and expansion of musical notation. The purpose of this section is to provide references and information relevant to working with these new notational techniques.

其他语言：deutsch, español, français, italiano, 日本語。
About automatic language selection.

#### LilyPond — Notation Reference v2.18.2 (稳定分支).