Why spatialize sound?
Many reasons to do that:
- create a "soundscape" around the listener
- move sound sources in trajectories
- create the illusion of distance
- move the listener through different spaces
- use space as a generator of tension and relaxation
- create an orchestra of loudspeakers to diffuse sound, using the spatial position of the speakers as part of the orchestral rendering of sound
Or, more importantly:
- create a space where more complex sounds can live and be perceived
Here are a couple of examples that illustrate how our perception of space influences the perception of separate sources:
- Streaming by Spatial Location (ASA demo track 38, page 82)
- The Cocktail Party Effect, John Pierce demonstration
How do we spatialize sound?
For a very good reading go this article about Approaches to spatialisation by D. Malham.