Hi, > > The AAC standard has been set since 1997. > > Who informed you? > > Anandtech, when they reviewed the new iPod: > http://www.anandtech.com/audio/showdoc.html?i=1827&p=14 > "All music downloaded from the iTunes Music Store is encoded > in Apple's own AAC format, which is a MPEG-4 derived standard ..." > > May be incorrect, but like I said, "as I'm informed..."
Yeah it is incorrect :) > And, as we all know, standards are often set long before > implementations are made, and implementations are usually > taken into use before they're 100% compliant or have > variations that differ from the specs (did anyone say > Microsoft MPEG-4 V1/2/3? Or MPEG-2 AAC vs. MPEG-4 AAC?). MPEG-2 AAC vs. MPEG-4 AAC? What's uncompliant about that. Both are different specifications so they can differ (they don't except for a bit set to 1 in the ADTS header). And MPEG-4 AAC introduced 2 new coding tools not available in MPEG-2 AAC. > Well, I remember trying Psytel and FAAC, and they didn't play > back. Come to think of it, I did get Nero's AAC ripper to That's probably because the AAC tracks in the MP4 files are signalled as MPEG-2 AAC, which are not played back by QuickTime (don't know about Media Center). That's a problem in QuickTime, not in the encoder (yes, decoders can be uncompliant as well :) ). > > Peelable? That doesn't work yet, IIRC. AAC can be scalable as well. > > Well, that's what they call it, since the "scalable" term is > used by others, such as realnetworks, to describe inferior > technologies that switch between preset bitrates. I didn't > know AAC could do that. Good to know. About not working, it's > a question of the current development in streaming software, > not the OGG files. Yes, what I mean is: Is it already implemented in Vorbis? Not that I know. (please correct me if I'm wrong). > > The MPEG-4 file format supports multiple tracks as well. > Next to that > > AAC has proper multichannel support. > > What about OGG Vorbis' multichannel support is improper? Well, here's something I heard (and did not look into for myself), but I heard that Vorbis has to go through some difficulties because of patents on this side (something with Ambisonics or something). This is what I heard from some knowledgable Vorbis people :) Menno _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder
