Quote Originally Posted by struth View Post
think optical can now do 24/192 max.. depends on the dac tbh too.. coax can go higher but it is grounded and hence if you have hum issues you might be better with optical. usb again is different and can be better as its timing is not done til it hits dac; again its all about implementation... best choice is dependent on your needs and system. generally unless your golden eared or need a particular rate, or your system requires a type your likely not to notice
One thing I did notice recently was choice of cable quality certainly does make a difference. I have had USB and Coax and optical cables that caused issues in my system with drop outs and poor connection so a decent quality cable is certainly a good investment.

As to cables actually sounding different in digital systems I am not so sure? From my experience there are marginal gains here.