Andrew asked: “I lost all volume control on my iPad. It worked this morning, now I can’t find it anywhere.”
Andrew, the obvious first thing to check would be switch on the side above the volume keys, that can be configured to act as a mute button, so flick it and see if the sound happens to come back.
You can also check that your volume is where it would be by either swiping up from the bottom and adjusting the volume slider from the Control Center, or by going to Settings, and then Sounds.
If that doesn’t work, whatever is going on is not settings related and it’s a bug of some kind. The best way to deal with that is the 3 Rs: Restart, Reset, and Restore.
First try restarting the iPad and see if the iPad happens to come back, if that won’t work you can try to reset all settings, or fully restore the iPad, but both of those will have effects beyond the volume, you will end up with an iPad that looks like it did when it came out of the box if you restore, so try the other options first.