Emu XL-7 & MP-7 User's Group

Can anyone tell me what the output format (bit rate and sample freq) is 
for the XL-7's digital outs? 

I'm having nothing but bad luck trying to get my XL-7 to interface with my 
Echo Layla24 digitally.  I thought I had a bad cable, yet the new one 
gives me the same problems.  Clips and pops occur about every second, 
easily viewable in the Echo Console.  I can hear the audio just fine, but 
it's interlaced witht his random popping that makes it completely 
unrecordable.  I know someone said they had it working just fine with an 
Echo Mia, maybe you could contact me off list so I can pick your brain 
some more?

rEalm