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TLV320AIC3106: Issue related to noise threshold

Part Number: TLV320AIC3106
Other Parts Discussed in Thread: AM5718,

Hi

I have custom board based on AM5718 EVM and TLV320AIC3106 codec.I have ported the audio driver and verified the audio functionality.

I have set following configuration

turned on AGC 

maximum allowable again as 28dB

Target level as -17dB

With this I got good sound volume.

Then I have configured the Noise threshold as -80dB and Hysterisis as 3dB.

This configuration cut the noise and also the volume level reduced.

Why this reduction of volume?

please help

Regards

Satheesh Kumar S