How to listen to audio from ISO image

I got hold of an ISO image that supposedly contained many audio tracks. But initially I had no idea how to get it all out. I tried playing the ISO file directly with VLC media player but that didn't work. I learned that there were other media players but I think you had to buy it (correct me if I'm wrong) and though there might have been trial versions I wanted to be able to listen to it all the time - not just when the media player software was in the trial period.

Then I came across some software that could extract audio and/or video files from an ISO image and I tried a few of those until I came across one that worked: MagicISO. Here are the instructions on using this software: http://www.magiciso.com/tutorials/miso-isoextractorwin.htm. Even though this software was offered for a small trial period we can extract any number of files before the term expires. I extracted from a 4.2GB ISO image.