After installing Android TV x86 on my idle PC, I found that I could not adjust the volume and had to manually adjust the volume knob of the speaker. Although it's not a big problem to use, it's a bit uncomfortable.
After searching for a long time, I found out that it was a sound configuration problem.
That's probably what happened, open settings in the upper right corner->Device Preferences->Sound->Use Fixed Volume
just turn this off
But if you don’t have a remote control, you still can’t control the volume.