Quote Originally Posted by ronand View Post
Another thing to bear in mind is that your amp is quite old and probably doesn't handle multichannel AAC - its worth checking the manual.
Just as an aside - almost no AV amp will handle AAC natively over HDMI. You need to get the box to transcode AAC to AC3 or PCM. My Sony DN1060 will handle all sorts of exotic Dolby and DTS multichannel formats over HDMI, but not AAC.