> Fortunately, if we compare codecs on a computer, double blind tests are very easy to perform. > When a program like ABC/HR (ff123.net/abchr/abchr.html) plays a random file for us > to identify, > since we have no way to know if it is the original file or the encoded file, > we can say that the test is double blind. ttp://wiki.hydrogenaudio.org/index.php?title=Blind_test