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TLV320AIC3254 录音后播放,SNR NG

Other Parts Discussed in Thread: TLV320AIC3254

我们有用TLV320AIC3254 codec,后面挂了一个TPA6205 功放,有两个mic输入。

目前测试流程是 用一个louder spk 播 1KHZ/0dB音源,录音,然后连接AP2722 去播放这个录音音源,发现SNR非常差。

但是我查询规格书发现ADC的SNR数据非常好,请问现在从哪个方面考虑去解决该问题?