One thing about digital AES/EBU, this connection will not transmit, unless instructed, an SCMS copy production code, meaning you can make unlimited digital to digital copies, and unlimited digital copies from the copies. These connections also allow digital copying of SCMS protected DATS This was very important for professionals back when consumer DAT recorders only used Toslink and IEC 958 connections, which were forced to carry SCMS copy protection, making only one digital to digital copy possible; and, no possibility for a digital to digital copy from the copy. For me, I did not want any possibility of grabbing a DAT to copy and send to client that was not highest quality, or which the client would not be able to use as desired.