Cousin Ken,
Good points from UD. Don't let the naysayers sway you from using the built-in harmonizer. It is fabulous and you don't have to pay extra musicians that CAN'T normally sing on key anyway
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Live: Korg PA4X/EV Everse 8s/Senn 935/K&M stand
Studio: Korg PA4X/Yamaha DGX670/Boss BR900CD/Tascam DP24SD/MTM Iloud/Sony C80/AGK 214/K&M stand