I've noticed when I'm playing music, downloaded as individual songs (not an album) the volume varies between songs with no change in the Windows 7 volume settings. Some songs are louder or quieter than others with the same Windows seven volume settings. For some songs, the green level bar on the volume control is almost maxed out, and for other songs, it's barely visible with no change in the windows 7 volume settings. Is there a way to boost the gain on individual songs, to make the ones I can barely hear, louder?