I started to listen to that Beatles song "Now and Then" but it didn't seem to me to be that good IMO.
Whatever use of "AI" was made, it didn't have the ability to get to the same deep quality of the best of their songs.
So I agree with you in that merely recognising and enhancing isn't sentient AI.
Just because an AI is programmed to be able to say "I think, therefore I am" doesn't mean that it can in human terms.