First off, I would like to apologize for my recent absence but I am back and ready to bring you tons of new content.
It has been a personal gripe of mine that Astro threw out MP3 player compatibility with their A40 Wireless System. I scrounged the internet and found no answers about how to use the headset with music in conjunction to game audio. After a bit of tinkering, I finally figured out how to get it working. However, this answer also provides the ability to play the audio you're listening to over XBL and PSN. I wanted to put out a quick tutorial for those of you experiencing the same problems as myself but, please be respectful of the others you're gaming with and disable voice chat if you will be playing music using this method. Just remember, with great power comes great responsibility.