Thanks for the reply

Just to clarify, the KN2400 has 4 APC modes

Basic :- 1 fingered chords
Advanced 1 :- Accepts fingered chords but disregards unrecognisable chords
Advanced 2 :- Accepts fingered chords and for unrecognised chords it plays the auto accompaniment according to the keys pressed
Pianist :- Entire keyboard as piano

Hope that makes sense to you as I still need a solution