i have (phillips brand) at&t digital cable w/o the spdif output, but i called them and they're bringing me one with it on the box. I was wondering how to hook this up because i've read some channels aren't DD maybe just some of the premium and payper views. should i leave my analog RCA hooked up along with the digital coax or can i use just the digital coax. Also if anybody has this setup did you hear any differences in the sound or what. Is the Cd channels in DD? any info is helpful and useful.