hello all. i use a digi 003 rack and would like to hear audio coming from my computers line out or my ipod through my studio monitors. i don't have a mixing board otherwise I would just run my 003 output and the computer/ipod to the board and plug the monitors into the main out. is there anyway to run a computers line out into the 003 so I could hear it though my monitors? I see the s/pdif input on the back but I am very unfamiliar with that protocol and don't know if that is close to being the same as an rca input. any help? thanks.