I think I can hear the difference between 320 kbs mp3 and lossless CD Red Book, but I am not sure I am right. There is indeed a lot of research that suggests that there is no audible difference. The Harbeth User Group is about to organize a test for everyone to join: http://www.harbeth.co.uk/usergroup/forum/subjective-soundings-your-views-on-audio/music-recordings-a...
The MP3 is finally...dead!
According to it's creators, the MP3 has now, officially been put out to pasture:
http://www.npr.org/sections/therecord/2017/05/11/527829909/the-mp3-is-officially-dead-according-to-i...
http://www.npr.org/sections/therecord/2017/05/11/527829909/the-mp3-is-officially-dead-according-to-i...