I'm using a Realtek sound chip in a Mac Pro 2008 with Windows 11. There doesn't seem to be support for 5.1 sound using SP/DIF. I have a Logitech X-540 and a Technics Digital SH-AC500D Surround ...

If a USB audio driver won't install on the first connection, then it can happen if the USB audio 2.0 driver (usbaudio2.sys) isn't classified as a generic driver.

A few sites suggest uninstalling the Realtek drivers and letting Windows install some generic audio drivers instead, but I'm not sure this is the best solution. I figure you guys know better.

Extract generic modem driver: 1. After downloaded the USB HCF generic driver for Win XP, extract the driver from the HCFu_WinXP.zip file.B. Upgrading your current modem driver: 1.