sound.Play question

Im working with the addon Roll The Dice, and im trying to make one of the things that can happen is it plays a sound. Im trying to use sound.Play to make it happen, but what directory does that look in? The main directory of /garrysmod or the directory the roll the dice file is in?

Edit: also does the audio file have to be .wav?

lua/autorun/.

The file can be any sound file that is supported by GMod, so .ogg, .mp3, or .wav.

Here’s an example addon which puts sounds into sound/

NOTE: When calling any sound play function, sound/ is omitted. When using resource.Add[Single]?File then sound/ is required…

https://dl.dropboxusercontent.com/u/26074909/tutoring/_zipped_code/acecool_ttt_end_round_music.rar