The VoiceWorks vocal processor from TC Helion has multi-voice harmonies, transparent pitch correction and fat automatic double-tracking, all so realistic you can solo them with confidence. It's got superb effects and a new HarmonyHold feature which lets you freeze your backing harmonies while you sing over them.

Features: S/PDIF I/O; phantom power; mic preamp; compression; EQ; tap-tempo delay; reverb; 4 independent harmony voices; 2 lead thickening voices; humanization of harmony voices with vibrato, inflection and pitch randomization; fully-adjustable gender and voicing; 100 factory presets, replacable by user-configured presets.