I did a fresh install of Windows 10, and then restored the drivers from that Google Drive link. Did Windows Update and Intel Driver Assistant, as well as install Realtek HD Audio. But I still am showing no audio devices and under device manager I have the yellow triangle on Multimedia Audio Controller.
Could someone with a Larkbox Pro please provide that driver? Thank you.
Regarding the Sound driver, I would like to introduce the Lark Box Pro driver set.
Installing the Sound driver is manual.
After manually installing from Device Manager, manually launch the Realtek HD Audio control panel.
You can see the speaker icon in the driver.
Once started, it will be displayed in the taskbar from now on.
Good luck 
The key you provided for file access was invalid. This is usually caused because the file is no longer stored on MediaFire. This occurs when the file is removed by the originating user or MediaFire.
The Larkbox Pro is amazing! It’s a full PC that is slightly bigger than your typical phone charger brick. It is small and light, uses US C for power. The most common culprit behind not working well is the drivers. If your drivers didn’t install properly or your drivers got corrupted then your Realtek Audio Manager can behave like this.
No point buying an excellent hardware with a very poor software support. It’s like buying a tip top car (on the paper) but no one actually test the engine prior to release and not to mention after sales warranty. Just don’t buy this LarkBox in the future anymore. I regretted it.