I just purchased a Pioneer VSX-91TXH Elite Receiver to be able to fully enjoy my Sony BDP-S1 Blu-Ray player. The Pioneer has decoding capablilties for Dolby TrueHD, Dolby Digital Plus and DTS-HD Master Audio. No problem setting up the receiver. The one question I have regards the the audio setup choice for HDMI. Do I select auto or PCM. Regardless of what audio select I choose on the DVD, True HD or PCM 5.1 (uncompressed) the display on the Pioneer shows PCM. I have read many reviews and they talk about sending umcompressed PCM to the receiver? All I want to know is which audio setup option to select.