Most “jazz” styles can play Cmaj7#5, only the chord tones, cause it plays a weird natural11. To “solve” it and avoid weird mistakes, I write the slash chord E/C.
But, you are so right that much used chords don’t play well: like in the music of Bill Evans (13b9, m9b5), Duke Ellington (lydian dominant chord), Kenny Barron (phrygian and phrygian with a natural 13), Hancock, Shorter, Beirach and Liebman (augmented sus chords, lydian and lydian augmented chords, lydian#9)... Renee Rosnes made the wonderful The Modern Pianist disk for PGMUSIC, Biab can not correctly accompany it, so she recorded the bass lines...

To know which scales (chords) BIAB can play, I made this video. But, for the impatient: Bass part knows only 7 7th-chords and ignores, mostly, all alterations. Piano part is slightly better.

If you ask yourself if the realtracks are more accurate, the short answer is: “no”.
The whole PGMUSIC “list of recognized chords” is sadly incorrect and -frankly?- dishonest advertising.
https://www.pgmusic.com/tutorial_chordlist.htm

Yamaha and Roland do it a lot better, harmony-wise, but lack the slightly better jazz and latin styles that BIAB has, lack the melody lead sheet, holds, pushes...


Njoy!


Biab, Kontakt, Sampletank and lots of nice libraries, from Fluffy audio to Abbey Road drums.
Check out these great contemporary Jazz Styles: www.jazzstylezz.com