Apps are muted on my iPad I have a 1st generation iPad and it is doing a very strange thing. All the installed 3rd party apps are muted. Video and music playback works and audio is ok, but all other Apps are muted.

Why is this happening? What can I do about it?
I figured this out finally. It had to do with the hardware switch on the side of the iPad was set to rotation mode. 

When I changed back this hardware switch to function as the mute switch then I could un-muted my iPad and all apps started to function normally. Then I could change back the hardware switch to become the rotation lock-unlock switch.