Assuming you are running Windows 10 version 1709 (RS3) or 1803 (RS4) [Nahimic 3 UWP and Sonic Studio 3 UWP apps do not work on older releases of Win10 like RS2/v1703 & earlier; must upgrade to either RS3 or RS4 if using old versions of Win10)
1 - uninstall 8504 FF03 legacy HDA driver AND Sonic Studio 3 & Sonic Radar 3 desktop apps (yes, you have to remove these as well), restart computer
2 - install either ASUS 8504 UAD driver from here OR generic 8507 UAD driver from here, reboot computer afterwards
3 - install ASUS OEM A-volute Nahimic 3 component driver (for Nahimic 3 UWP or Sonic Studio 3 UWP app to work) from ASUS. also again restart computer after installing Nahimic 3 component driver
4 - download & install Sonic Radar 3 UWP app from MS store AND Sonic Studio 3 UWP app from MS store (and make sure your internet connection is working correctly; and enjoy the audio experience with the apps
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A repacked 8507 generic UAD driver is available for easier installation
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