Extended frequency responce and brain waves in Rupert Neve lecture

Lecture CRAS 2001
https://m.youtube.com/watch?v=SsgQcyXyzss


It is mentioned after 1:00 that high frequency response above 20KHz of equipment leads to relaxation, lack of anger, even perhaps violence.
There are references to research published on papers.


Does a similar argument apply to class A versus class AB, B or class D amplifiers?


A similar argument between analog or digital recording?


As this is written a CBS digitally remastered cassette is being listened to playing Baroque music on a nice Panasonic RX-4922L portable radio cassette player.
Harpsichord and violins sound so realistic and extended in high frequency. It makes one feel tranquile and happy.