declared in "ao/ao.h";
This function initializes the internal libao data structures and
loads all of the available plugins. The system and user configuration files are also read at this time
if available. The library must be initialized before any other libao
functions can be used.
Do not invoke this function more than once before calling ao_shutdown(). If you want to reload the
configuration files without restarting your program, first call
ao_shutdown(), then call ao_initialize() again.