The book emphasizes that space is a key parameter in phantom music, on par with traditional musical elements such as melody, rhythm, and harmony. The author explores how sound travels through different spaces, interacts with the built environment, and evokes emotional resonance. Particularly interesting is the description of ‘surround space’, which the author likens to the atmosphere of a Byzantine church: sound is evenly distributed and the listener is completely surrounded without being able to locate the source.

Annette Vande Gorne summarises four categories of spatial experience in phantom music:

Surround Space: a totally immersive environment.

Source Space: the sound can be pinpointed.

Geometry Space: the soundscape is shaped by the structured interaction of spatial planes and volumes.

Illusion Space: Stereo technology is used to create the effect of perceived depth or distance.

It details the use of the Acousmonium, a loudspeaker system designed for the spatial projection of sound. The author explores a variety of sound diffusion techniques, such as dynamic source trajectories and the use of different timbral loudspeakers to create rich spatial effects. The authors provide practical examples of spatialized compositions, including techniques such as fades, oscillations, and rotations for constructing dynamic soundscapes that give sound narrative and expressive qualities.