Hi, On 12/5/2016 7:50 PM, Mark Brown wrote:
On Fri, Dec 02, 2016 at 09:48:58AM +0800, John Hsu wrote:
This bit will enable 4th order SINC filter. =1, filter will enable; but it consumes higher power. =0, the sinc filter is disable, and it should always keep 0 value to get high THD.
Therefor, disable the filter when codec initiation for better performance when recording.
This looks like something that users should be able to control at runtime - while some users are going to prefer lower power there will most likely also be some users who prefer the better performance (or perhaps even users who switch depending on if they're running on battery or something).
The function is not suitable for the voice application and easy to make distortion. Therefore, we want to disalbe it as default to get a high signal to distortion ratio. Yes, I agree it that users maybe want to eanble it sometimes. I can add a kcontrol for the function as well.