I read somewhere that the 990 does not have all of the newest codecs and I am having trouble finding a list of supported audio formats. When setting audio output settings on the ps3 it warns me that if my equipment is does not support a setting it may damage my speakers so here I am asking: what is and is not supported by the 990?
I believe the options on the ps3 include:

Dolby Digital 5.1 Ch.
DTS 5.1 Ch.
AAC
Linear PCM 2 Ch. 44.1 Khz
Linear PCM 2 Ch. 88.2 Khz
Linear PCM 2 Ch. 176.4 Khz
Linear PCM 2 Ch. 48 Khz