Do MP3 encoders sound different?
by Will Ryu Results I played the MP3s and test CD tracks through both my home stereo and my Sony MDR-V6 headphones (details listed below). The songs were encoded at a constant bit rate, forced stereo, at 128, 160, 192, and 256 kbs. All listening was done sighted (encoder and bit rate were known). I first compared the MP3s to the original CD tracks, and at 128 kbs I had no trouble discriminating the CD from the MP3s. At higher bit rates this became increasingly more difficult, but even at 256 kbs I believe I could hear differences by concentrating on certain parts of the track which were more susceptible to encoding error. However, since I did these tests sighted, I can t guarantee that I didn t imagine some of these differences. So please accept these observations with a word of warning. It is very easy to fool yourself into believing you can hear differences. Purported differences can fade away when you do the test double blind. “Razumosvsky” In the “Razumosvsky,” at 128 kbs, there is
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