I wouldn't mind reading your explanation as to why you think you know more about audio signal processing than a telecom engineer.
I'm a power engineer, a lot of this is out of my field of expertise.
But then, most of this is far outside anyone else here's field of expertise.
Somewhere along the line, everyone started to think they were experts.
What the hell happened to civilization?
Respect for the skill of specialized trades?
Respect for craftsmen?
Well, I almost feel guilty of having iniciated such a fire with my rather innocent comment....
My friend, he is brilliant, a science mind, and his statement is based on factual science (as many people have argued).
Me, not a scientist, but someone who has been raised with audio gear around. My father owned a bit of hi fi gear:thorens turntabler, sm tonearm, Shure magnetic coils, Nakamichi, Stax headphones, etc..... That was forty years ago....I had myself bought the best audio I could afford:Stax SR-5 headphones, Harman Kardon hifi gear, mission speakers, I even had a baby stax and a high end sony portable cd player....
Lately I had lost the interest in music. I had an ipad classic but I was missing the sounds from the cds.....although. I was not aware of this...
Then I stepped by chance on the issue of Flac files and DAPs like fiio. I gave it a try and I was shocked to see the difference between the X3 and the ipod classic. I could see (read hear) the difference, it was shouting at me....
So although my brain tells me my friend is right, my heart/ear tells me he is wrong....
But the only way to know it for sure is trying a blind taste of mp3 vs flac, hd tracks vs cds, ipods vs fiios, etc.......