you would have to put it in the missions folder
/missionfoldername/soundname
or i like to have a seperate folder for any sounds
/missionfoldername/sounds/soundname but it will work either way
then you need to make a text document (using notepad or something like it), which you need to save as description.ext, this also goes in the missions folder,but not in the sounds folder if you use that, and in it put this:
class CfgSounds
{
class soundname
{
name = "soundname";
sound[] = {"soundname.ogg", db-volume, 1.0};
title = {"TitleText"}
};
db is for volume ex. db-40
title is if you want to display text, if not just cut this part out
if you have more than one sound, add
sounds[] = {sound1, sound2, etc}; here:
class CfgSounds
{
sounds[] = {sound1, 3sound2, etc};
class soundname
{
name =....
...pretty sure thats everything.....