Hi guys,

The TC Helicon harmony engine is only licensed to be included in Band-in-a-Box and PowerTracks, so when you use it from within RealBand, RealBand uses the copy of the harmonizer in Band-in-a-Box or PowerTracks, not its own copy. This is why the audio harmonies often won't work in RealBand if Band-in-a-Box is running.

Generally it'll use Band-in-a-Box's copy of the TC Helicon, but since RealBand used to be available on its own, it can use PowerTracks' copy as well if needed

Thanks
Kent
PG Music