These libraries are available for other projects to use for 3D audio.
These libraries contain helpful utility and test binaries, but are really meant to be used by other projects.
At the moment, the Wavepacket Audio Libraries are built almost exclusively on the audiere library: http://audiere.sourceforge.net/
This library is released freely to the community under the BSD license (see http://en.wikipedia.org/wiki/BSD_licenses). Some portions of the code may be from other authors and those areas may be subject to other licenses. Those exceptions are called out clearly.