do we really know how good/bad is AC3 encoding? 2010-02-19 02:59:45 So I've been trying to learn about how good can the AC3 format be. Mp3 is excluded from the MPEG-2 spec (presumably b/c timing - AC3 was more mature at the time). But more interesting is that mp3 is also excluded from the Blue-ray spec, while AC3 is included. This doesn't mean that the standard-makers thought AC3 offers better audio reproduction than mp3, it could just be that lots of blue-ray discs will include better picture but the original already-encoded AC3 audio. And AAC audio has a higher ceiling and was there included over mp3.But this has gotten me wondering, how good, actually, is AC3 lossy encoding?It hasn't shown up in listening tests, either because people don't take it seriously, or because the only optimized encoders are dolby-licensed and very expensive to purchase.So I'm wondering - do we (by which I mean, "knowledgeable people here at HA) have a good sense of where AC3 encoding quality ranks?It's quite possible there are test results that I simply haven't seen and couldn't find when searching thread subject-lines.