Since the mid-twentieth century, George Crumb (1929- ) is one of the most influential composers of American Contemporary Music.

In his works, the place of having the utmost artistic charm is nothing better that the expression of the timbre.

occupies a place among the American contemporary composers, and he has successfully come on the international musical stage.

The process of exploring the work in this thesis is to first make an initial understanding of Crumb's life and his creative career in each period,

and then study further the related music basic elements from " Lux Aeterna ", such as lyrics,timbre, pitch and rhythm.

By George Crumb research to understand how the musical performance to new creative way.