On 1/11/2012 8:03 AM, J G Miller wrote:

Since the iBiquity codec is *based upon* but not *is* the AAC+ (HE-AAC)
codec, it is not valid to use tests on the original AAC+ (HE-AAC) codec
as evidence that the iBiquity codec its-self delivers quality.

iBiquity tweaked the AAC+ Codec to improve it for radio. So while the
iBiquity Codec is going to sound better than the generic AAC+ Codec,
it's not going to be orders of magnitude better. Hence the tests of AAC+
do apply to the iBiquity Codec, just realize that the iBquity Codec is a
bit better.

In any case, other tests, of the iBquity Codec confirm the results in
terms of sound quality.