The new scheme is different, but quite simple: We divide whatever input clock we get until we reach the "base" rate of 44.1/48k. We distribute this around the interfaces as "loop sync." Each interface then taps off the loop sync and recreates an ultra-low jitter local clock. The local clock is then scaled internally according to the session sample rate. This scheme gives excellent jitter performance throughout the system, and means completely solid internal timing. This is really needed, too, since the higher sample rates are much less forgiving, timing-wise. The new scheme is partly why we can achieve much longer DigiLink cable lengths. The real limit there is the cable itself. The net result is that we can take in and put out almost any multiple of the session sample rate.We also really improved the electrical handling of the external (BNC) clock drivers and receivers. As long as good quality 75 ohm coax and connectors are used, super long clock runs should not be a problem, and clock distribution amplifiers shouldn't be necessary anymore. If you need to feed multiple workstations, though, you might want a DA just for cable impedance matching.