This test is open until the 5th of August and seems to be much, much harder than what one would expect, even for experienced developers of sound codecs, at bitrates that the public would find "too little", as the comments on the thread at the discussion forums (see: http://www.hydrogenaudio.org/forums/index.php?sho
Do you think that you have good ears? That 64kbps is "too little"? Then try it for yourself and participate. Your participation will help us improve the codecs so that they are even closer to being "transparent" at such "low" bitrates.