A 风格 originally evolved from poetry 文本声 or phonetic poetry involving 作品 that are to be 听 in the first instance 不 read 艺术家 involved in this 风格 have come from the worlds of poetry fine 艺术 表演 现场 艺术 and 樂/乐 A 数 of 電聲學/电声学 作品 in which the voice is the only or key 声波 源 belong to this 类别