The song I chose was the famous theme song from the movie Requiem for A dream, Lux Aeterna (Latin for eternal light). It was originally composed by Clint Mansell. It has many different versions, but the one that people are more likely to have heard is the orchestrated version arranged by Simone Benyacar, Daniel Nielsen, and Veigar Margeirsson for The Lord of the Rings - The Two Towers movie. Below is a recording of that version.