the chatbox feature is still a work in development. apparently it is a shared code, and constantly being improved. those changes should automatically update on our site as they are made.
many ppl in the parent forums have requested changes that have been eventually made. i put in a request to add sounds. otherwise, we can also modified the css coding for our indivisual site. however i have no clue on that level of technical detail.
for now, no sounds. apologies.
cheers
-blue