【单选题】【消耗次数：1】
以下对于声音的描述，正确的是_______。
①
声音是一种与时间无关的连续波形
②
利用计算机录音时，首先要对模拟声波进行编码
③
利用计算机录音时，首先要对模拟声波进行采样
④
数字声音的存储空间大小只与采样频率和量化位数有关
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