I dont see how this has any relationship to an arranger, its strictly a sequencer and does not follow your chords....

The only way i can see this being use inan arranger setting is by creating a midi file and then exportin it ... And importing the midi fyle as a style pattern on an arranger who has that option..

However, i would allways use a daw or pc for this kind of creative things.... They have way more options and are much easier to operate becaus of the bigger screen.