There are either FILES or they are part of a file.   You need a file dump, not an ISO.

Some Xbox and Xbox360 games use simple WAV, WMVs, and 360 has MP3 files. 

Extracting sounds from the game?  You will have to find software that does it, and you still need a raw file dump, and not an ISO.

i was assuming it might of already been in the form of a iso but thinking now pooky prolly has the original. been thinking orig xbox tho and forgot that u can jus throw the ps2 game into ur pc dvd drive and explore it. socom uses .zar for there sound files and there all in 2 files. this is the best info i could quickly find on how to open .zar's http://filext.com/info/archive/index.php/t-1502.html

is there a sound folder? if so what are the file extensions of the files in it?

PS2 games will work. I was trying to make a Resident Evil theme for my PSP and was looking for something I could use for the scroll sounds. The program I used (dont remember btw) showed a list of all the sounds/music in a game. It was a pain because it included EVERY different sound in the game so I was literally scrolling through hundreds of sounds.

Depending on what exactly your application use is for try searching google for:

MFAudio 1.1 = This tool allows you to play, convert, and downsample audio files that use some of the more common formats among PS2 games. It can be used to reduce the size of music in DVD rips, replace the music with something else you prefer, or simply play the music from your favorite games.

PSS Plex = This tool allows you to demultiplex (split) a PSS movie file into it's component MPEG2 Video and WAV Audio streams, and multiplex (join) an MPEG2 Video and WAV Audio stream into a PSS movie file. The author wrote this tool with DVD ripping in mind. PSS Plex comes with a tutorial to teach you how you can use it to downsample PSS movie files in order to retain them. The tutorial includes Zone of the Enders, Extermination, Warriors of Might & Magic, Army Men: Sarge's Heroes 2, and X-Winter Games examples.

I've not tried MFAudio but i've used PSS Plex before on a mortal kombat ps2 game and got an adema music video from it.

- http://forums.afterdawn.com/thread_view.cfm/203306

MFAudio 1.1 - http://www.zophar.net/download_file/3180

PSS Plex - http://www.zophar.net/download_file/3182

Try those, If they don't help, look for other things at Zophar's Domain (http://www.zophar.net/utilities/ps2util.html)