Vocal multiplier plug-in.
It's hard to classify a plug-in like Antares CHOIR Evo - it's not quite a harmonizer, nor is it a typical chorus effect either. At its core, CHOIR Evo is a unison generator that's optimized for vocals. You can use it to turn a single voice into 4, 8, 16, or 32 remarkably distinct separate voices. Spread these out across the stereo field to create an awesome 3D effect, or keep it tight and create incredible vocal density. Another great use for CHOIR Evo is to turn a one or more backing vocal tracks into a full set of backup singers. No matter how you use Antares CHOIR Evo, you'll be impressed by the results!