If you've beaten your head in after realizing that there is no such beast as
/dev/audio in Interix....

I've added support to pkgsrc that enables audio output from Interix apps,
via a specially configured client/server install of esound.  As of today,
audio/esound will now build and install the client library and tools fine,
but with an "esd" daemon that doesn't work due to lack of output devices.

I've added a special package emulators/cygwin_esd (and its dependency
emulators/cygwin_lib) which will install a stripped-down Cygwin base and
"esd" daemon.  Included in emulators/cygwin_esd is a rc.d script to start up
(and shut down, if pkgtools/rc.subr is installed) the sound server.

I haven't yet fixed audio/arts, but I'm working on that now.  It will
require that arts be built and installed under Interix with esound as an
output device.  (Might sound ugly at first, but this is precisely how KDE
can coexist with GNOME.  :)

Stay tuned; more to come!

-- 
-- Todd Vierling <tv@duh.org> <tv@pobox.com>