Oh, seems I could get a clean death drumbeat sound after all. Also I finally removed their swords. Thanks for the feedback guys, it helps.
EDIT: Also some good news. There is now a
Sound Pack mod which works in a similar way to texture packs.
Requires ModLoader. I'll be using this for uniformity since ModLoader and this mod both seem popular - Though as I keep saying, since Modding is complicated for some, it'll be purely optional and won't be required for the map to work.