I was going to suggest something similar, i.e. go with a midi track (Realtracks are never going to crack these!), enter the closest 3-note chord, generate the track, then freeze it and in the note editor erase the notes you didn't want.
It's a cumbersome workaround for sure, but probably the only way you got.


Just because you can, doesn't mean you should!
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BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)