I have done some reading, but don't feel that my query has been definitively answered. What I want to know is whether I need to buy new features or if what I have does the same thing. I have a HK avr347 which plays multi ch PCM, a fat ps3 which outputs Dolby true hd and DTS HD-MA as multi ch PCM. From what I gather PCM is uncompressed audio, and the hd formats are compressed but decoded and played at the same bit rates as uncompressed. So does my setup play the same audio as if I had a slim ps3 that did the hd audio via bitstream and a receiver that was hd audio enabled? Would the difference be audible enough to justify a new receiver and console or Blu-Ray player?