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tlv320aic3106的底噪问题,请问要如何解决?

Other Parts Discussed in Thread: TLV320AIC3106

TI技术人员,

你们好,目前我使用3106,发现底噪过大,验证场景如下:

(1)MIC3L/MIC3R输入线性音频,直接绑定HPLCOM/HPRCOM,发现有明显的底噪,

(2)断开MIC3L/MIC3R的音源输入(断开电路),依然有比较大的底噪,初步确定为3106本身存在底噪,

录音文件见附件,

请问要怎么去消除或者降低这个底噪?