Ummm...I don't quite understand your question about the output of the reciever. I think what you mean is that the normal analog, not direct, inputs on the reciever add some sort of DSP to the input, thus coloring the sound of a high-resolution source. Dobly Digital and DTS work at their own bit rates dependent on the disc. If you're thinking of the Sharp combination I mentioned, it works at a 1-bit rate connection. This is the standard of DSD, or the technology behind SACDs.

SACD is multi-channel capable dependent on the disc. I have a multi-channel SACD player that I really like. Go take a look at Sony's site for more information on the format.