There is no way to take a sound file in any format and turn it into an asset that the game can utilize. You can read a bit more about the question and answer from Larian in
this thread.
Be sure to check out some of the tutorials on the Larian wiki and I highly encourage people to join the discord server and check out the modding channels there. There are some good stickies for getting started and a lot of information sharing on a daily basis.