2000-07-01 Added a loop to the write system call to make
	   sure the buffer is totally played.
1999-07-12 Another rewrite. Moved all the common code to
	   play.c. Introduced two new example playback
	   applications. One sleeps while waiting for
	   the buffer to ge played the other uses DMA
	   sound.
1999-19-11 Changes in the output. Always indicate the ioctl
	   used and the return value.
	   Added a DEBUG define. If set to zero no messages
	   are printed while recording/playing.
1999-18-11 Reorganized program
	   Added support for all linear modes
	   Get pending bytes with SNDCTL_DSP_GETODELAY	
1999-15-11 Initial release