Then double-click RtkNGUI64 file to open Realtek HD Audio Manager. You can press Windows + R, type C:\Program Files\Realtek\Audio\HDA\ in Run box, and press Enter. Open Realtek Audio Manager to access Realtek equalizer.
You can open Realtek equalizer in Windows 10 and adjust its settings if you like. Read More How to Open Windows 10 Realtek Equalizer