I never have seen that. I have the 4k Studio D which is the digital studio version and the stereo digital I/O is SP/DIF in/out with wordclock in for house sync.
Please read the following link for more of an explanation. I have the digital board and an aes/ebu input in my soundcard therefore I needed to convert spdif coaxial to aes/ebu. The link above explains the pro and consumer spec amongst many other things to do with these formats. I do all coversion of digital formats with the following piece of kit.
"When you point to the moon, what do you see in front of your finger; Your task is to feel, not to think, when you can understand that the lesson will be learned.
Bruce Lee (1940 - 1973), During a television interview"
Last edited by adey_fid on Wed Feb 18, 2004 1:16 pm, edited 2 times in total.