Go into the main data folder of vanilla and to the sounds folder. Copy the events.dat file (CTRL+C)

Go into the eb/data/sounds folder. You'll probably see no events.dat file there or a 0-byte one (I do not have it installed so cannot say). Just rename it if it exists.

Now copy the vanilla file you copied above into that folder (CTRL+V).

Done. Simple.

note: you should always check with EB in case they have done something that this above procedure does not take into account.