Thanks for the suggestions, The only way I get music is using optical from the ps3 to system and hdmi from ps3 to tv. I have no control over the sound. Can't turn it down on the system nor tv and only works when setting is on auto not analog.
like dude said above but when you go into settings on ps3 and down to sound and when you switct it to OPTICAL and continue that next screen will have DOLBY 5.1 Box checked and others, if your receiver doesnt support one that is checked like AAC then it wont work. just try checking boxes Dolby Digital 5.1 & DTS 5.1 and see if it works. if not, uncheck DTS and try again. my receiver wont run AAC so i keep that unchecked.
it all depends on what your receiver handles in formats.
and make sure your like in on receiver is on tbe right input.