PS3 as source?

Hi folks. I am currently w/o a cd player right now. But I have my collection ripped to WAV files and send them to a benchmark dac. It is not as engaging as the Ayre CDP that I had to part with but it will do.
I also have a ps3 that I have used for blu ray but recently I ran an optical out to the benchmark to try it as a transport. It sounded like crap. Had a very bizarre echo ish sounding effect. No base and very harsh. Am I doing something wrong in the set up, or just expecting too much from the player?