Originally this 词 was used specifically for a 磁带 循环 that is a fragment of 磁带 of which the beginning and end have been cut and spliced together and therefore 创作 a 种类 of continuous ostinato which can be of any 长度 Today this 术语 is also used for samplers 计算机 and other 实时 数字 乐器 声音 of a 特定 长度 have been 录制 but these might be shorter than a 长度 needed during 表演 An 内在 循环 within the 声音 创作 by the 用户 allows the 声音 to be 延（续） indefinitely 源 - Leigh Landy 1994 实验 音乐 Notebooks Chur Harwood