This 术语 is used in two different ways It is synonymous with certain 创新 电子 形式 of pop 樂/乐 包括 so-called 智能 舞 樂/乐 智能舞曲 Most of this 樂/乐 is primarily 音符 底/基于 whilst using 声底 元素 and 技术 It is also used as a 术语 for a 种类 of 声底 樂/乐 that has been 创作 as a reaction to more elitist 形式 of 声底 樂/乐 Here the reaction can be 已有 in the 种类 of 材料 used such as 讨厌 声 包括 噪 or the 故障 声波 创作 in CDs that are 不 working properly and other sorts of 数字 or 模拟 detritus thus 创作 a 低保真 效果（效应） that exists 独立 of most pop and 艺术 樂/乐 发展 See also the 电子 discussion in chapter 1