I've come across this process before and it seems to be related to Realtek audio services. RTKAUDUSService64 is a Windows service that handles audio-related tasks, possibly including audio playback control, equalization and other settings. It's a legitimate service and should be running on systems with Realtek audio drivers installed. However, if you're experiencing issues or performance problems, you may want to consider disabling or uninstalling the service to see if it resolves your issues.