To access 5.1 channels or SPDIF, you need the legacy control panel. Search for C-Media 3D Audio Configuration or install the CMediaPanel.exe from your driver package. You may need to run it in Windows 7 Compatibility Mode (Right-click .exe > Properties > Compatibility > Run this program for: Windows 7).
Open Device Manager (Right-click Start button > Device Manager). Cmi8738 Driver Windows 11 64 Bit
Open Device Manager, double-click the unknown device, go to Details tab, select Hardware Ids from the dropdown. You’ll see a string like PCI\VEN_13F6&DEV_0111&SUBSYS_12345678 . To access 5
If you get error "The driver is not intended for this platform," you need to manually edit the .INF file (see Method 3). Method 2: Disable Driver Signature Enforcement (For Code 52) Windows 11 blocks drivers that aren't digitally signed by Microsoft. The CMI8738 drivers are not. If you see Code 52 in Device Manager, you need to disable this security feature. Open Device Manager (Right-click Start button > Device
Download a confirmed working driver package (e.g., v5.12.01.3054 for Win7 x64).
Windows 11, being Microsoft’s most modern operating system with stringent driver signing requirements, does not natively support the CMI8738. However, where there is a will (and a legacy driver), there is a way.