the voiceprism plus is a fantastic processor for vocal, including a variety of harmonization effects. turn yourself into barry white, the beach boys, or an operatic soprano! this unit has been in a studio rack and was hardly used, so its in perfect condition. i'll sell it for $300 or best offer. shipping will be extra. for more info about the voiceprism, see http://mixonline.com/products/review/audio_tchelicon_voiceprism_plus/