One more thing I tried. In full keyboard mode if I play a C chord holding down C, E and G and than add any note to the left of C that extra note shows and sounds as on bass notes. So I can have C/Eb, C/E, C/F, C/F#, C/G. Other notes show and play as different chord variations. Again, I don't know if this is what many of you a looking for but I did the test!
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)