Reviving Part 2 of this thread, dealing with the issue of the R-4 Pro, using digital input via AES/EBU and also using analog input on the other two channels.
I finally got around to speaking to Edirol tech support about this issue, as I was concerned about the suggestions that using a V3 for the digital input would be governed by the V3 wordclock, while the analog inputs would be governed by the R-4 Pro's internal wordclock. Tech support had to contact R&D in Japan for the answer and get back to me. Apparantly, in the same way that the DMIC gets its wordclock from the V3, when you select digial+analog on the R-4 Pro, it then uses the wordclock of the incoming digital signal to control both the digital input, and the analog inputs, i.e. it's all run by the same clock, in this case the V3, so there will be perfect synching and no potential for drift. Hope this answers any questions.