Originally 樂/乐 in which the 声波 材料 is 不 预录 but instead uniquely 生成 电子 历史 through 震荡器 and 噪 发生器 currently 数字 There are some 尤其 in the United States who 用 this 术语 today as a synonym for 電聲學/电声学 樂/乐 The German 相当于 德国电子 樂/乐 has more precise 历史 connotations referring to 电子 生成 post-serial 作曲 that commenced in the early 1950s in the 广播 工作室 in Cologne In French 电子 樂/乐 is also currently used as a synonym for 风格 of 流行 电子 樂/乐 such as 铁科诺