https://www.bleepingcomputer.com/news/microsoft/microsoft-investigating-new-windows-10-high-pitched-noise-issue/ > Microsoft is working on resolving a high-pitched noise issue Windows 10 users hear when using some 5.1 audio configurations after applying recently released cumulative updates. > "After installing KB5000842 or later updates, 5.1 Dolby Digital audio may play containing a high-pitched noise or squeak in certain apps when using certain audio devices and Windows settings," Microsoft explains on the Windows 10 Health Dashboard.