I found this online, it's a simple test to see if you can hear any difference between 320kbps and 128kbps. Feel free to test your golden ears: http://mp3ornot.com/index.php Lets say best out of 10. Once you've finished your test copy the results and paste them back here to show your talent. One member using $1,295 1plus2 IEM's has already achieved 15/15, able to determine the difference. How well do you think you'll do?