There's a simple tool to figure it out. It's called double blind test. I went through it, and could tell mp3 (lame) from lossless, with high confidence. Many p

There's a simple tool to figure it out. It's called double blind test. I went through it, and could tell mp3 (lame) from lossless, with high confidence. Many people I know and trust not to make shit up have done the same. Parent likely did the same as well. However, I cannot ABX Opus from flac. It becomes impossible for me somewhere 100 to 160kbit/s depending on song, weather and luck. mp3 is quite good for a codec from 1991. But it is deeply flawed, and compares quite poorly to what we have today.