I've uploaded a more or less untested build of OpenAL-soft 1.16.0 here:
https://dl.dropboxusercontent.com/u/26599983/openal-soft-1.16.0.7zIf anyone wants to help with testing it that would be great.
I don't know if the shared object is drop-in compatible with the old one. Given the rather big increase in the version number it might not be so I suggest compiling programs specifically with this version for testing.
In order to get it compiling I had to rewrite the AHI backend and I've also replaced the threading code in it so it uses pthreads same as the other backends. Also I had to build a newer gcc cross-compiler as the newer OpenAL code makes use of a feature which is only available in gcc >= 4.3 as a consequence the above binaries are compiled with gcc 4.9.1.
I'd like to know that it works correctly before I replace the version that's currently on OS4Depot.