In the last few months/weeks, AAC has been receiving some media coverage thanks to the efforts of companies like Apple and AOL to push the format forward. Since there are several available AAC encoders, both free and commercial ones, interest for a comparision was raised by concerned users. Then this test was created.
It's purpose is to find what encoder performs best encoding AAC at 128kbps CBR.
The encoders and parameters tested are:
Anyone interested in AAC quality, or people that have no interest but would like to help making this test better. You don't need excellent hearing, but some good gear is welcome (headphones are must-have).
Download ABC/HR + the readme file from one of the following locations:
If you already have ABC/HR, get the readme here:
http://pessoal.onda.com.br/rjamorim/Readme.txt
Further instructions, and links to the sample packages, are inside the readme.
For people using BitTorrent: I strongly suggest you download the samples using it. The torrents are available here:
http://www.hydrogenaudio.org/extra/AACTest/
It would help me save bandwidth and you will probably download faster too.
The average size of each sample package is 4Mb. It sums to 47Mb, all the 12 packages.
You can. But you won't be able to use the ABC/HR utility, that is Win32 only. Since the reference file must be hidden (That's the HR in the name), tests performed without it wouldn't be valid. So, I can't plot your scores against others created with ABC/HR. But your comments on sample quality and artifacts would still be welcome.
The test is scheduled to end on June 15. This date may be extended if proven to be necessary.
If you have any other question, please get in touch.
Thank-you very much,