Hello everyone, I just made few audio tests few hours ago, using ABX Comparator. I compared a recent released track on FLAC format, that I had ripped with EAC on my previous PC, with the same track on MP3 256 kbps. It happened that I couldn't tell the difference between the two tracks. I used my Sennheiser MM 500-x, which I believe has always allowed me to enjoy my lossless music library so far. My DVD is the HL-DT-ST DVDRAM GH20NS15. Consequently, my ears must be the problem. I am so appalled right now because I have ripped all my CDs to ALAC, as I am mainly on Mac, using iTunes then. I have bought new CDs recently and I do not know if I should rip them to FLAC as always, or simply rip them with iTunes on AAC 256 kbps (since I am not able to hear a difference). It happens that I could not tell the difference because of the well-known "loudness" dimension that appears on every nowadays production. I have the original Marvin Gaye's What's Going On album (2001 remaster) but I don't think I would be able to tell a difference between a FLAC and a MP3 version of it neither. What should I do now? Should I continue ripping to FLAC and "wasting some time" or just put the cd on, press rip, and wait 2 minutes? I don't know what to do now. Maybe my 90s Hip-Hop CDs sound better compared to their mp3 counter parts because they have not been mastered according to the loudness pattern of today's productions. I don't know and I am honestly tired of doing these tests. I just want to enjoy my music, but I want the best of it. As a matter of fact, I have the original Yeezus CD and the iTunes version that I have bought sounds somewhat better to me. How ridiculous. May you please propose what method should I use now? I feel like I will rip my library all over again. Clear OCD. Sometimes it is just easier to put the original CD on and press play, you know? Thanks to all for reading and helping. Have fun.