I would be surprised if this software will give anything more than 2 channel pcm, to get multi channel (5.1 or 7.1) uncompressed pcm requires an hdmi cable because of the amount of sound data coming from the source which would currently be a blu-ray player only or maybe an HD DVD but not sure. Optical / spdif does not have enough capacity to carry multi channel pcm.
Cheers
Peter
My B&O - BS3, BV4-50, Beomedia 1, BS3200, DVD1, BL8000, BL6000, BL3, BL2, BL7.4