Sonic Art/(声音艺术) -> Genres and Categories [G&C]/(风格与流派)Sonic Art/(声音艺术) -> Sound-based Music/(声音作为基础载体的音乐(声基音乐)) -> #[Tier 2] Practical Aspects for Composers/([第二]实践层为曲作者) -> Users Group/(用户群)