I want to add digital coax output to my AV710. Is it as simple as connecting a coax jack to certain pins of the existing optical jack? If so, which two of the five pins do I connect? Thanks

My soundcard is old (Sound Blaster Live! 5.1) and I am wondering if my ears would benefit from an upgrade to a newer model. I play lossless audio files through iTunes and really only care about making that process sound the best. Other soundcard features for gaming or audio creation do not...