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https://e2e.ti.com/support/audio-group/audio/f/audio-forum/773074/faq-tlv320aic3104-adc-clicking-noise-when-adjust-analog-input-gain-either-mixer-gain-or-pga-gain
在ADC转换音频时调整模拟输入增益会产生噪音伪影。 能否避免这种情况？
输入衰减器不能动态更改。 通常，这些值设置一次以标准化输入电平。 PGA增益可以在寄存器19和22中软步进。 您可以将该级别提高到每2个FS一次。 另外，避免跳过中间步骤(不要一步从0dB跳到+10)。
