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TLV320AIC3104: Audio forum

Part Number: TLV320AIC3104
Other Parts Discussed in Thread: AM5728


I have an AM5728 EVM which has tlv320aic3104 audiocodec. It is booted in Linux.

When I record my voice using the arecord command, I get some noise along with my voice. I have tried to change Line PGA gain. But there but there is always some noise for every Line PGA gain value that I set. More the Line PGA gain more is the noise recorded and vice versa.

What  can I do to remove the noise altogether ? Can anyone suggest any other parameters that I have to change to reduce noise ? 

Is there something to be done in the device driver of tlv320aic3104 audiocodec? 

Also, please note that the EVM gives no noise (negligible) in mic record output when booted in android. 

Please help!