I would like to use some sounds from TMW as a base for adapting, remixing and building some sound effects for the GNU FreeDink game: http://www.freedink.org/
(it's a modified version of the Dink Smallwood RPG game and engine)
I would like to know if it's safe to use some of the tmw sounds in a GPL content project. I know that the COPYING notice in the tmwdata repository is showing the GPLv2-or-later license, and The Mana World seems to be a clean project, but well, to the least it would be nice to know the author(s), so it can be properly credited.
The sounds that are going to be used are: