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TLV320AIC3101 PGA on the fly



Hello

My customer intends to use the PGA gain via ' on hte Fly'  for portable audio( pro-sound).

However, if  he had changed the  gain 6dB( ex. 6db to 12db) at once, there are some click noise.

( If he changed 0.5dB,  click is small)

Customer tested Follwing ( soft stepping ), but  it was not effective to solve click.

> P0R19[D1-D0] : Left-ADC PGA Soft-Stepping Control
> P0R22[D1-D0] : Right-ADC PGA Soft-Stepping Control

Q1    In general, do you think PGA gain can be changed  on the fly without click noise?

Q2   If there were any solutions ( register settings), please adivce. 

I am sorry that such basic questions, but please adivice.

Best Regards

Kanji Shibatani