More likely that he hasn't got the vocal processor and harmonizer set up to his standard. I heard some pretty awful harmony on You Tube where A.J. was demonstrating with "Jamaican Farewell". I know Donny would not be happy with that sound. God Bless, Don
As promised here are two short on the fly Vocal Harmony Demos I recorded on the Ketron SD7. The VH is more then adequate with good tracking.