I think the definition of a container (m4a, wav, aiff, etc) is that it should be able to contain different audio formats. Mp3 (if you ignore the mp3 surround distraction), only holds mp3.
We can se files with MP# extension. Is MP3 a container also, or it is a codec alone?If its a codec alone, then how can we play and have some meta information in the mp3 files?
how can we play and have some meta information in the mp3 files?
I'm guessing tags are essentially just extra data in the headers?