You actually may be on the right path here; I don’t know if the SDIF-2 clock interface on the Network Bridge is DC-coupled (like the Ch1/Ch2 are), but it may be able to serve as the Word clock input into the Debussy? 
You actually may be on the right path here; I don’t know if the SDIF-2 clock interface on the Network Bridge is DC-coupled (like the Ch1/Ch2 are), but it may be able to serve as the Word clock input into the Debussy?