Hello @alessandro_niola — Thank you for your report!
To start, may I kindly ask that you please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
May I also ask that you share a complete screenshot of Settings > Audio?
Additionally, if you have any active firewall or antivirus on either machine, try disabling them and see if the behavior goes away.
Regards,
Dylan