I have a Tritton 720+ 7.1 surround sound and my computer has an S/PDIF OUT port so I tried using it but in the windows sound manager, it doesn't show and someone told me that S/PDIF only works with Sony and Philips electronics. Is this true? If so is there a way to connect a non-Sony, non-Philips optical cable into an S/PDIF OUT port?