It can be downloaded from realtek-universal-audio-driver release - include old version and for DISM installation

After RealtekHSA.inf is installed, Windows will find Realtek Audio Control in MS...

The latest stable version UAD for ASUS is published from Realtek FTP3 server (github mirror - 6.0.8854.1), the zip filename include a word "WHQL" mean it is a WHQL Final release.

If your MB/laptop...

I have checked the 8855.1 driver from Sway is WHQL Beta.
8851.1 WHQL Final signature should be
Realtek Semiconductor Corp. ----- ‎Thursday, ‎December ‎5, ‎2019
Microsoft Windows Hardware...

Tetsuo
I had send a PM to you, you can find the Realtek UAD driver for your Razer Blade Stealth.

New 8777 FF00 compatible with Windows 7 available. Check out on my github repository.

8694_UAD_WHQL_AVO.7z --------------- with Nahimic integration
8694_UAD_WHQL_XPERI.7z ------------ with DTS integration
8694_UAD_WHQL_ICE_RTK.7z ------------ with ICEpower integration...

8683_UAD_Dell_SST4001.01_2427.02_MA80_193_269_4070_WHQL_MUP.zip
8666_UAD_Dell_MA80_162_264_4070_WHQL_MUP.zip
8656_UAD_Dell_MA80_82_263_4070_WHQL_MUP.zip

MA80_162_264_4070 -> Wave MA8APO...

FX Configurator
Select Endpoint: Realtek High Definition Audio S/PDIF
Product Config Tool
Select Realtek System Effects - HDA -> Apply Products Settings to Selected Endpoints

198775

This Realtek HDA Driver is for Sonic Studio 3 Desktop App
8504_FF03 with Nahimic
** REMOVED **

Try APO Driver to get Realtek System Effect over SPDIF if you don't want audio enahcers on...

Install Realtek HDA
8504_FF03 with Nahimic
** REMOVED **

Download APO Driver
Making Audio Enhancers Work on Windows | TechPowerUp Forums

Select SPDIF Endpoint -> Product Config Tool - >...