Realtek HD Audio low and bad quality sound after Windows 10 upgrade

https://superuser.com/questions/958121/realtek-hd-audio-low-and-bad-quality-sound-after-windows-10-upgrade

https://www.windows10forums.com/threads/poor-sound-quality-windows-10-64bit.1548/

https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/windows-10-audio-sounds-tinny-when-headphones-are/014e1023-12f3-4b78-8d7e-20190d0afd50?auth=1