Great news! Finally, I've been able to hear the difference between lossless and 320kbps MP3. I've been testing with Foobar+ABX. I have found a section where I can reliably (100% out of 8 ABX tests). I stopped after that. Source: The Four Seasons by Amandine Beyer & Gli Incogniti - 24bit 96khz FLAC Track: 5 Concerto Pour Violon RC372 Section: 1:50 - 2:04 Initially, I was looking for a better filled sound stage in various bass strings section strikes (which helped me pick out 192kbps vs 320kbps mp3). But this time, I wasn't hearing the differences there. So I started looking elsewhere and found harpsichord. There, I picked out the differences in the details while there were fairly high amplitudes of bass and violins. Once I found it, it was easy to pick it out reliably. I will test with some other types of music and report back with the findings.