An 电子 treatment 联合 chiefly with the 合成器 and the electric guitar applied to a 信号 to give the 印象 of a multitude of voices It is 基于 on the 使用 of 几个 parallel 延迟 lines each with a 随机性 variation of 延迟 时间 centred on 30-40 ms the chorus 效果(效应) is used as its name suggests to 创作 the 印象 of 多 声音 源 from a 'solo' 输入