2004
2004 - Manning, Peter. Electronic and Computer Music. Oxford: Oxford University Press

In Peter Manning’s 
Electronic and Computer Music (Oxford University Press, 2004), Max Neuhaus is documented as a pivotal figure who bridged the gap between the 1960s electronic avant-garde and the emergence of site-specific sound art. Manning situates Neuhaus within the history of technological innovation in music, focusing on his transition from a performer to an engineer of social and spatial environments.

https://people.wku.edu/joon.sung/edu/anim/anim330/sound_art.html#:~:text=The%20term%20site%2Dspecific%20refers%20to%20a%20work,made%20the%20first%20steps%20toward%20sound%20art.