i made a modpack the other day and there is no sound. its not the speakers because youtube and everything else works fine i did some googling and it looks like a pretty common problem but none of the solutions ive tried seem to work one said to just log out and back in to the launcher but that didnt work another said to download the resources folder and add it to the minecraft folder but that didnt work either. the modpack is 1.6.4 heres a link if you want to look at it:
technicpack.net/modpack/details/tickld-pack.295091/