At this point in time, you CAN'T use a toslink connection (i.e. digital connection) for DVD-A or SACD. It's not allowed for security reasons. They're afraid of copying if they allow a digital connection for Hi Rez audio. Maybe some day in the future it will be enabled. But, for the moment, you have to use the 6 analog cables for Hi Rez audio.
I think if you have a Denon DVD player (3910 or higher) with D-Link (Denon's proprietary digital connection), and a Denon receiver with D-Link, you can use a single digital cable for DVD-A only. SACD hasn't yet granted permission for it's use with D-link, but it's supposedly in the works.
