The Sefer is a thin book that was placed in many Shul throughout the country about what each type of music listened to causes in a person physically and how it affects his neshama and ruchnius
Yes, that’s the one that I wrote I hoped it wasn’t, and
that’s not exactly what it’s about, which is too bad,
because that would probably have been more interesting
(assuming a reliable source of such information exists).
(Mods, if you feel the need to reject this post,
can you just edit out the part under the line?)
_________________________________________________________
It’s more like the following ideas, in order:
Music can have a bad influence on you.
The current state of modern society is due to its music.
Many have said that rock and roll has a bad influence.
Modern Jewish music is rock and roll.
Rock and roll (and therefore modern Jewish music) is African music.
Rock and roll has negative physical effects on the body.
Modern Jewish music is bad for frum society.
Action must be taken to combat modern Jewish music.
Whether there is any reason these ideas should be believed
is a question that the book does not have a good answer for.
Sometimes this is evident from the book itself,
and sometimes additional information is necessary.