Board Thread:General Mod Discussion/@comment-27200931-20160507031554/@comment-25101690-20160512134630

SamwiseFilmore wrote: Even though Wesnoth is free, I don't know if that music is protected by copyright, etc. Distribution of such a reasourcepack is almost certainly illegal.

 SamwiseFilmore (Admin) (Fill My Mailbox) As far as I remember, the license allows free redistribution and even redistribution of modified versions, but you probably have to distribute it under the same license and credit the original authors.