I am always playing around with audio stuff and decided last night that I am in need of something : This thing turned out to be a DAC.I now need some info as to whether there would be any difference if I run my Apple Tv through one or am I wasting my money?I have also realized that the inputs on these devices are USB,optical etc. but no rca.I would need to connect the Apple Tv to the DAC via rca,but these are only on the output side ??? ???