All Windows users should immediately update their computers. An exploit rated 9.8/10 (CVE-2024-38063) compromises all devices running Windows with an IPv6 address.
One restart post-update restarts changed it and helped, but something was still off. Took me like 30 minutes but it looks like my nvidia HDMI audio output got reset to a really low 16 bit sample rate. Got that set back to a decent 24 bit and its closer, but something is still off. I don't think I had any settings/levels/enchanments.
Sounds like windows changed your audio driver. I'd download the most recent audio driver available through nvidia, then uninstall your current audio driver in device manager and manually install nvidias.