Board Thread:Off-Topic Discussion/@comment-20791725-20131003093527/@comment-32500188-20131003121120

Do you use any sort of audio program outside of Vocaloid? If not, have you gotten yourself any VST equalizers to use?

Personally I choose to use either Pushtec 5+1A, KarmaFX Equalizer (part of a free download pack, just scroll down until you see "KarmaFX Plugin Pack 2.1"), and more recently Equilibre (for folks that prefer graphic equalizers instead of strictly dials and sliders). All three of them work very well for free VSTs. Pushtec has a bunch of presets that you can experiment with, though the classic dial format may take some getting used to. KarmaFX has a few, too, as well as more than enough slots to fiddle around and make your own. Equilibre is a little more advanced... unfortunately doesn't have that luxury of presets, and it takes some fiddling around with it and know-how to get results you might be looking for, but it works great nonetheless.

Your best bet is to experiment with a few hi-cuts to see if that will limit the raspiness. :-)