Someone at work has a Pioneer RX570 which they believe has dolby prologic. Is anyone familiar with this unit? He wants to buy a dvd player to get 5.1 surround sound (so I'm guessing the player would have to have a decoder). There are no labeled dvd connectors in the back of the receiver, but it does have 5 separate speaker outputs. Bottom line...will this receiver be able to provide 5.1?