ACC parts/Lower up down button:

for ACC parts when Arranger modo
for Lower when Organ modo

Lower voice can not use in Arranger modo.


Upper 1/2 button:

select 1 or 2 with other button


My opinion for EM-50:

Good option as Style Player
Not so good for Pro musician performing use.

Sound Quality= Good with external audio System. Internal is weak.

Effect= Reverv, Chorus only