Can't use tags on music. Best you can do is rename them in some sort of vague order and hope for the best when you have 50+ sounds/effects/combat music/area music/etc. :P Sound organization and searching, and sound API are my 2 biggest "hope they do something next update" wishes. When a 3rd party soundboard/application played thru direct input to voice chat is an easier/faster/more organized option to consider, it does need some work :)