It was the first--and simplest!

"Simpler RealTrack(s) There is often (but not always) a 'Simpler' checkbox when selecting RealTracks in the RealTracks picker (Assign RealTracks to Track dialog window). Even for my jazz songs, I often select this for the bass or piano when it sounds too 'busy', or as PG Music describes it, the playing will be 'less embellished'. Less embellished may mean that you will hear fewer non-chord tones."

Thanks again!
t