Dear Sir
We uses PCM2706 Audio DAC for USB MP3 player.
So far we encountered a problem need your help to clarify. below is our schematic file
http://www.seawalk.com.tw/0000/2.html
When we turn on the system power, PCM2706 has strange sound, we checked the waveform and found some strange as below video.
www.seawalk.com.tw/.../2.1.mp4
the situation only happens in the beginning 5 minutes of turning on power, then it will disappear
Moreover we ran EVT 500kits only 18kits has this issue.
May you give me some suggestion of this problem? Thanks,