Update. The problem is solved. I re-install again Windows, but not from recovery partition, but with a clean install, with a bootable usb pen with Windows build with Microsoft Media Creation Tool. Installing Window in this way I discover that in Bios  in storage section there was a Raid configuration instead of AHCI (faccory settings, absurd but it was so). So I change this setting to AHCI. After installing the operating system and drivers, the audio problems no longer occurred. Hope this helps someone else. Thnak you
Hello, in random way during audio/video playback there is a buzz. It seems like a latency problem but I can't be sure. Here the problem: [URL] I tried to update to last drivers, disable some sarvices (as I have seen in some posts), reinstall windows, but with no results. The buzzing randomly happens. Can it be a hardware or software problem? Other 9710 users with the same problem? Thank you very much. Andrea
Dell xps 9710 audio buzz problem