[M4IF Technotes] Looking for HE AAC test software / AAC-LC

[Dave Singer]

>By the way, is it true that the AAC codec in QuickTime 6.3 has been
>updated quite a lot regarding its sound quality,

Yes, our release notes at 
<http://www.apple.com/quicktime/products/qt/> confirm an updated AAC 
codec.
>And could you tell us which version
>of the AAC codec is implemented in iTunes 4.01 and with which quality
>setting compared to QuickTime 6.3?

I believe that QT and iTunes use a common encoder, but I'm afraid the 
details of the settings that iTunes uses are unknown to me.
-- 
David Singer
Apple Computer/QuickTime