Nvidia High Definition Audio 5.1. However, to get informed about how to access bios, refer to the first step of fix 4. In windows 10 sound panel, click and highlight the audio device that you want to have 5.1 and then at the bottom left corner click on configure.
Navigated to device manager > audio inputs and methods > lontium (nvidia high definition audio) > update drivers > browse my computer for drivers > selected path to your folder hd audio but then it says the best drivers for your device are already installed. The only way i managed to do that was trough oss but i removed it (and reinstalled mint jost to be sure) because i couldn't. “nvidia high definition audio driver” is part of graphics card driver package means in order to download nvidia graphics card driver package in your computer, hd audio drivers will be install with the package.