Why do some things have sound and others don't?

Some videos in Waterfox play with audio (Youtube and Rumble are the sites I tested, both play fine). Facebook videos do not have audio. I’ve launched a few games in Steam, and they have audio. There’s an older game I play sometimes called Osmos that does not have working audio.

As I have no use for needing pipewire, and the docs for it confused me, I’ve tried completely removing it and installing pulseaudio, using the instructions in here. No change. Following reboot, Osmos started working again. Facebook videos still do not have audio.

Any help with this issue would be appreciated. Thank you!

Great-looking distro. Aside from the weird audio issues, I’m loving it so far!

okay, last night I installed vlc with all its plugins. That slurped in a bunch of other video and audio stuff that I hadn’t installed, and bam…on the next reboot, everything that wasn’t playing audio before was. So I guess I just didn’t have the right libraries yet. So…just letting you know.