xaudio2: More than 256 audio sources

[Andrew Eikum]

On Thu, Aug 11, 2016 at 09:42:04PM +0200, Fabian Maurer wrote:
> Some applications run out of sources when using xaudio2 so I'm working on a 
> patch that allows more than the 256 sources provided by OpenAL.
> 

We already require recent versions of openal-soft, and openal-soft can
be configured to allow more than 256 sources.

See comments 26 and 27 on bug 39591:

  https://bugs.winehq.org/show_bug.cgi?id=39591#26

(Aside: alsoft-config should allow more than 256 voices, but currently
doesn't, so you have to edit the config file manuall. This is already
fixed in openal-soft git: https://github.com/kcat/openal-soft/pull/41 )

Is this an acceptable solution to your problem? Perhaps I should
document it on the wiki.

Andrew