Tony,
#1 Working with Midi files and Kn keyboards is a bit unfriedly.
#2 When you connect a laptop to the Kn6000 using midi wires, IN, OUT and THRU, you are subject to having somwe changes happen in your keyboard that you may not want. It is the same when you load a midi file in your keyboard, unwanted changes.
I can handle the changes but not on a job. The first time I use my sub outs on my keyboard it sounded great, when I loaded the next midi file it cancled the changes I had made in my keyboard -- the dancers look up at me and I had no idea what had happened. yes, I know you can protect the keyboard from unwanted changes, but I live to keep things as simple as possible.
Sooooooo, my call is to play the midi files from the laptop. There are many ways to improve the sound of the laptop so that the sound is par with the KN.
#2 Once you make changes in the midi file (sequence) and then save it in the Kn the file can not be used in any other keyboard without making changes--lot's-of-work.
#3 Using the laptop to play audio through my laptop allows me to control the volume from my KN7000---and----I can use my laptop setup with any keyboard. If you ever change keyboards you will have a major problem with the midi files you have chnaged and saved in the Kn.
#4 The lyrics are 2 to 3 times larger.
#5 I can play CD's from the laptop through my KN.
#6 Important--I have a midi program in my laptop --- create, changes, whatever -- then save it.
#7 Nightmare -- My keyboards falls, I've got my laptop.
Having all that if I wanted to create a great midi file, I would load it into my KN7, edit it, change it to a Technics midi file, Add a control track, rhythm track and a chord track--then spend a good amount of time and have the best file going. My opinion!
Tony, if the Kn6000 can take a file created on a KN6500 I would send you one of my friends worked over midi files.
Hope I helped, John C.