Figured this would be worth suggesting. The bard song always makes the same lute sound, even though you may want to have a bard be using flutes or drums or something other than the lute.
Could the bardsong made so it makes no sound when used? Could it be made that you could choose (throuhg a comand, maybe /c bardsong drums) the sound it makes?
The different custom songs override the sound, or at least some of them do.