The second G above middle C is abnormally loud as compared to the preceeding and following notes. This is a recent problem. Any suggestions?
This is a function of your sound card and its synthesis of the sound. Changing sound cards/sound fonts/synthesizer settings are your options for improving the sound.
See also: Search for past soundfont discussion (http://www.noteworthysoftware.com/nwcforum/search.php?term=soundfont)