Sven Bader (German guy) has made a small nice little tool: Sweet Dreams. This tool will help fall into a deep sleep with good music, and NOT wake up in the middle of the night and the music/PC is running.

                 

 With Sweet Dreams you are able to control (reduce) the Volumen and Duration before the PC is Shutdown/StandBy/Hybernated.

 The site is in German, but the application is in Engelish. And just press Download on the page.

 Get your Sweet Dreams here:  http://www.svenbader.de