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TLV320AIC3104 如果想用降噪功能,该如何配置寄存器?

Other Parts Discussed in Thread: TLV320AIC3104

目前公司有一个海思3521D+AIC3104方案的产品,音频采集进来后有一定的底噪,硬件这块排除了好久,没有解决,希望能够通过降噪来改善。有验证过海思降噪功能,有效果但对音质有比较大的影响,现在希望能够验证下AIC3104本身自带的降噪功能,自己根据芯片文档改了0x1c,0x1f寄存器的值,发现效果很不好。

请问启用AIC3104本身降噪功能,有什么需要注意的地方?