There have been several past projects that are no longer under current research.
Vector base amplitude panning (VBAP)
A popular and widely used technique for positioning virtual sources using amplitude panning for arbitrary 2-D or 3-D loudspeaker layouts.
Real and virtual acoustics
Analysis of sound field in spaces and room simulation techniques for interactive virtual acoustics.
DSP techniques for room response modeling
Presents a particular digital filter configuration and related design methods for room response modeling and equalization.