Microsoft occasionally releases driver updates through Windows Update that can help with compatibility issues.
Boot Camp Support Software 5.1.5621 (for 2011-2012 models). Troubleshooting Guide: Microsoft Boot Camp Sound Help . Apple Macbook Pro A1278 Audio Driver Windows 10
Legacy drivers can struggle with Windows 10's fast startup and audio enhancement features. Apple Macbook Pro A1278 Audio Driver Windows 10
Select the extracted Drivers/Cirrus folder from the Boot Camp download. 2. The "EFI vs. Legacy" Issue Apple Macbook Pro A1278 Audio Driver Windows 10