Originally Posted by Piman 
Or, in the review of the S350, What HiFi said "For sound, it can output HD audio in bitstream form, or if you want to do the decoding in the player, it can convert everything to LPCM apart from DTS-HD Master Audio". Does this mean that if I use an optical or coax digital link, I can get surround sound that way?
Not on the HD formats - optical can only output 2 channel LPCM due to the bandwidth constraints. So you need to either:
A. As noted, a straight optical connection, to give DTS and DD5.1.
or
B. Analogue cables to your amp and a player that will convert HD audio formats to LPCM for playback over the analogue connection.