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Message: <blockquote data-quote="Dr Forinor" data-source="post: 1170516" data-attributes="member: 156724">This is a 2 part question, the first of which I think I know the answer but if possible would like someone more knowledgeable to explain it so I understand better, and the second I have no clue.1 - Why does a video with only 2 channels of sound (lets say AAC at 90kbps) sound much better (louder?) through my TV speakers at a given volume, than a 5.1 channel sound (lets say AC3 at 448kbps)?2 - Why does "AAC 48khz 5.1 320kbps" sound better than "AC3 48khz 5.1 640kbps"? I thought AC3 was higher quality than AAC?</blockquote>