The BD/DVD Audio Settings for both Optical Digital and HDMI are set at Linear PCM. I currently have the HDMI output for Audio Output settings set to include Dolby Digital 5.1, Ch. DTS 5.1ch, AAC, Linear PCM 2ch 176.4kHz and below, and same with the 5.1ch. None of the above seems to produce any sound out of the operation of the PS3 outside Bluray output.