IgorC has also been active in this testing field in a few 2009 threads here, amongst which http://www.hydrogenaudio.org/forums/index....showtopic=66949I'm just as curious as you btw, about Vorbis' and AAC's current-day performance at 96k. My own not so profound tests (little time, bad headphones) suggest quality at least as good as LAME -V5. Let's hope coining our interest here triggers some more.
Looking from outside, 64kbps tests seem like bless to "CELT is out!, Help wanted"
Does it change anything?
First we should figure out what is the most optimal AAC encoder and only then do multiformat (MP3, Vorbis, AAC...) test.