Ummm....Can you notate that for me?

If the "music" that the audience hears is sounds, is it notated? 

It is indeed! Below is the notation for Poème électronique. 

I admit my analytical skills are not proficient enough to really analyze this notation, as I would have thought it was a map of the Grand Canyon. But it is interesting that it is notated and that someone can, perhaps, make a replica of the poem. 

The sounds were played through approximately 425 speakers, that were placed in various places throughout the pavilion.  This created a sense of "surround sound" for the listener, an aspect of that was not introduced until this point.