help with harmionzing

plfffffft

Madly in anger with you
Apr 2, 2002
655
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Philadelphia, PA
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So I've got a few riffs I'd like to harmonize. Thing is, I have no idea how to do that, besides just using the few harmonies I know from learning other bands' songs. I wanna knowe how to actually apply it myself. So could anybody point me to a site or something to help me out with that?