Here the screenshots in an attempt to explain visually. Snapshots taken in Ableton. I also have FL Studio, if someone wants to see it in FL, let me know.
Setup three different Scaler 2 instances, one as chord root, one as Melody and one with Rhythms respectively (either of the last 2 without preconfigured chords)
Be sure to configure the internal MIDI routing like so…
The Melody Scaler instance just “listens” to the MIDI output from the ROOT instance, no chord progressions configured in itself. Just configure your desired expressions there. Incoming notes will be expressed by its local expression config highlighted/marked red…
Same with Rhythm instance…