Help with setup of Berkeley Audio Design Alpha USB

[thumb5]

As you said, it looks as though it "should just work".  Some questions which might help narrow down the cause of the problem:

• what sample rate are you using?  can you try lower, e.g. 44.1 or 48 kHz?
  
• is the AES/EBU cable particularly long (more than a couple of metres)?
  
• can you try a different cable?
  
• can you verify that the Alpha is producing output on the AES/EBU (e.g. by connecting to a different amp or pre-amp, if you have one)?