I know i'm not the only one who was in the situation, had bought a Xbox 360 pro and wanted to use their own HDMI cable for video and Optical for audio. Whilst fiddling around modifying cables to get this setup i tried calling the xbox helpline to no avail, however my last called gleamed a vital piece of info, the xbox repair centre's direct e-mail! E-mailed them with my problem and the next day i got a phone call to clarify it was the "HDMI audio adapter" (their name for the dongle) that i needed. I was told one would be shipped out free of charge as i was under warranty, and was even given a reference number should anything go wrong. I thought no more would come of it until this morning the adapter popped through my door! So for all of you looking for HDMI video and optical sound, send them an e-mail to this adress: [email protected] It's got to be worth a try, could save yourself a lot of time and money!