Hi Justin, Sorry to trouble you again. Customer had tried to tie the AUDIO pin to CKSEL, mute pin of DSP & Damp, there has some improvement but still cannot totally eliminate the 'jerk' sound. (Please visit the site to view this file) Refer to the slide page 4, the error pin goes high when change to unsupported format of input. Questions: 1) The error pin goes high awhile then low again even though the input signal is unsupported format. Is this condition correct? 2) If you zoom in the waveform, there is a very short period of noise just after error pin goes high -> DIR9001 muted. This should be the delay. So customer would like to utilize the error pin to trigger the muting on DSP in order to eliminate the noise after error pin goes low. I think the noise in front is not possible to be eliminated. For your info, there is small 'tick' sound occurs in previous reference design which using Cirrus Logic IC. So QA not accept for the louder 'jerk' sound. 3) Any cautious point if customer use error pin to trigger for muting? Thanks, Best regards, Chin
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