Mp
As well you can use the Digital out of the BCD-1 to your BDA-1
If I were you I would Go from BCD-1 Digital out AES-EBU to your BDA-1
It's a single balanced Digital Cable. I purchased all of my Cables from Bryston.
If you could get a hold of James that would be your best bet.
Check what cables you are missing and Order. As short as possible is better
Enjoy
Does it get any Better
Robert