The music that begins at the 19-minute point.. is the music that plays when the Leonardo de Caprio Maxwell Lord is anylizing the electronic configurations of the horrifically amplified Megan Gale voice during the fatal internet video... where Maxwell Lord (Leonardo de Caprio) is examing sine waves and cosine waves of digital graphs of trigonometry as digitalized lines sound configurations on a graph screen ... all part of his sound technology....

https://www.youtube.com/watch?v=RDOaodw5X2s&t=972s