以下是官方回答：
opt. ADAT enabled:
both optical I/Os work in the ADAT mode
opt. S/P-DIF enabled:
One optical I/O (ADAT A) is switched to S/P-DIF optical mode. The S/P-DIF output is sent to both the coax and optical outs, the S/P-DIF input is received from the optical in while the coax in is disabled.
Use the normal S/P-DIF source / dest modules in the Project Window.