Strange, if I search RealBand's user guide for "overdub", I do find information. That being said, I would never overdub in RealBand. There are 48 tracks to work with, I would just keep recording on new tracks, and keep the parts that I like from each one.

Overdubbing does make sense in Band-in-a-Box, since Band-in-a-Box only has one track to work with. In a DAW like RealBand, it isn't commonly done, or necessary, IMHO.

Thanks
Kent
PG Music