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你好,我使用PCM1808时候,1808作为slave模式,左对齐,采样得到24bit数据,但是后面有16bit限制,我把24bit的低8位给舍弃了,现在的现象是,当声音较小时候,使用DA输出的音频听起来正常,但是一旦输入的音量超出一个范围,噪声就会逐渐增加,再大的话就全变成噪声了。现在不知道问题出在了哪里,希望大神能够帮忙解答一下!