By Roberto J. Amorim. Old tests : some codecs have been improved since then. http://www.rjamorim.com/test/index.htmlBy Sebastian Mares, who managed the public tests after Roberto. http://www.listening-tests.info/
I would also like to say that any moderator or administrator is welcome to update the pinned post with new links.The update should be notified either as an answer to the pinned post, or here, so that we don't add the same links twice.A line stating "last updated by xxxx on dd/mm/yyyy" should also be added on top of the post, and be updated by anyone posting modifications in the list.
FYI,My mirror site is now available only at http://listening-tests.freetzi.com . The t35.com hosting service ended a few days ago.
I am very happy to have recently discovered HA. Especially after some long discussions with friends of mine who insisted that they can hear a difference between FLAC and a high quality MP3, but were not willing to perform a simple blind test. It's a pleasure to see that so much effort is put here into objective blind listening tests.
However, I am surprised to find so little academic research on in this subject. The problem with most ABX tests on this forum is that the number of participants is generally limited and that you are dependent on the equipment of the participants. I find it strange that I can't find any academic research into this subject. I would love to see a test involving a large number of participants, a fixed set of (high quality) audio equipment and proper statistical analysis. With a large number of participants also factors like age (with their differing audible frequency range) could be investigated.
Hi !I've added two ABX tests to the pinned topic.An impressive result, although some successes of the same kind existed before :DA-AD chain (Xonar Essence STX, Xonar D1 soundcards), with different antialias filter settings. Software emulation of the soundcard filter included. Successful ABX for all files except the dummy one.Results : http://www.head-fi.org/t/676885/successful...ed-to-192-24/60Description of the files : http://www.head-fi.org/t/676885/successful...90#post_9738961
If I understand this test correctly, it is a comparison between a file and an upsampled version of itself.
if you do it right with no failures of your experiment or the equipment in your experiment, you should obtain random guessing.
Strangely enough, while the insertion of an AD/DA step in the path of an analog signal is nearly never detected in blind listening tests, it is not uncommon to see the application of a DA/AD step on a digital file being ABXed with success.