![]() ![]() ![]() There are other double blind approaches, see this article for details. This kind of test is a little better than an "assign the bitrate to a sample" type test because the listener can't guess their way through it with any accuracy and skew the results. So A might be 192 kbps and B might be 320 kbps and the listener has to decide whether X is from the 192 or 320 kbps encoded track. The ABX type test seems to be popular for bitrate comparisons: you listen to sample A and then B and then X and decide which of A or B sample X is from. In this case you could have some one listen to samples of music and have them guess the bitrate of the samples. Empirical tests such as waveform analysis will most definitely show differences in the output, but that doesn't mean the differences are audible. If you're after audible differences the only test you can use is a double blind test. ![]()
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