How to change tap sound of an Android device? The tap sound on my new Jelly Bean Android tablet sounds cheap and tinny. Is it possible to change it?
Yes 

You cannot change it unless you have root access. But you can disable it if you don't like it. Go to Settings => Sounds => Deselect the Touch Sounds option.

Just in case you have root access, go to /System/media/audio/ui/ and replace the file named touch.ogg or tick.ogg or effec_tick.ogg or the one with a similar name.