	
	
	
	
	
Embedded Sound Files.
By using the open SNDFILE with a file descriptor function:
      SNDFILE*  sf_open_fd (int fd, int mode, SF_INFO *sfinfo, int close_desc) ;
it is possible to open sound files embedded within larger files.
There are however a couple of caveats:
	
 Read/Write mode (SFM_RDWR) is not supported.
	
 Writing of embedded files is only supported at the end of the file.
	
 Reading of embedded files is only supported at file offsets greater
			than zero.
	
 Not all file formats are supported (currently only WAV, AIFF and AU).
The test program 
multi_file.c in the tests/ directory of the
source code tarball shows how this functionality is used to read and write
embedded files.
