1) The Culture Industry:
Enlightenment as Mass Deception
Theodor Adorno and Max Horkheimer
http://grace.evergreen.edu/~arunc/texts/frankfurt/hork/hork.pdf
or
http://www.marxists.org/reference/archive/adorno/1944/culture-industry.htm
2) (((Optional)))
Adorno on Music http://www.icce.rug.nl/~soundscapes/DATABASES/SWA/Some_writings_of_Adorno.shtml
Wikipedia of the Frankfurt School
http://en.wikipedia.org/wiki/Culture_industry#The_Frankfurt_School
Enlightenment as Mass Deception
Theodor Adorno and Max Horkheimer
http://grace.evergreen.edu/~arunc/texts/frankfurt/hork/hork.pdf
or
http://www.marxists.org/reference/archive/adorno/1944/culture-industry.htm
2) (((Optional)))
Adorno on Music http://www.icce.rug.nl/~soundscapes/DATABASES/SWA/Some_writings_of_Adorno.shtml
Wikipedia of the Frankfurt School
http://en.wikipedia.org/wiki/Culture_industry#The_Frankfurt_School