I download a midi file and I tried on my KN6000. The drums sound was very bad. So I check the drum track and I found exactly at the same time it play 2 times the same note. I tried on computer it play well. You could try by enter 2 same note at exactly the same time in step mode (2 X snare drums).

I realize they do this to have a more loud drum sound in a midi file.

How to automaticly remove just duplicate notes ???
The KN7000 do the same ??? or may be with the 128 polyphonic ??? ok ??