I'm interested in using this item with my logitech x-530 pc speakers which output to the three 3.5mm channels on this box HD Audio Rush 5.1 Gear Sound Decoder for DM500s DM800 xbox360 ( http://lunashops.com/goods.php?id=35 ) to get true 5.1 audio via optical on my PS3. I'm not 100% sure if this would work tho as i'm using self powered PC speakers? Could anyone confirm if this would give me true 5.1 surround sound? Many thanks in advance .