Hi,
I've had use for the merge function for pad creation. I normally create pads ( & styles) from midifiles and so I use the kn sequencer. As pads 5 & 6 only have 1 instrument track & 1 chord track,
I've had to mix 2 tracks together to create 1.

Possibly another use might be if creating a complicated drum track ( from scratch) if doing multi track recording in the kn.

A question was asked on the KN7 about Punch In recording ( we weren't sure if the kn had it, but susequently I noticed it does.)
From what I understood the member wanted to add extra drums to a drum track using Punch In facilities, but I wasn't sure if the kn did it.
Anyway I thought this alternative might be of some help to him.

Possibly another way of using merge function.
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Record your basic track drums ie bass & snare.(ie track 9 )
Then track 8 record your hhats, if it all sounds okay, merge the 2 tracks together to track (track 7), if not just rerecord the hhat track, at least you haven't disturbed your original Bass & Snare track.
Now that track 8&9 have been merged into( track 7),
record your cymbals on track 8
if all is okay merge track 7&8 to
track 9 if you're going to add more drums,
OR to track 10 if you've completed your drum recording.

You could virtually build up quite a complicated drum track, by merging drum tracks together.
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I also convert the odd style using sequencer to style function. The thing that gives me the most grief with a converted style is usually the drum track. Velocities of the drums can be a problem. A drum track played on a psr may not sound right on a kn because the bass drum might end up being drowned out by a hihat etc etc.
I recently came across a utility program that separates a drum track ( from a midifile) into separate tracks ie bass drum track 1, snare track 2 etc etc what this allows me now to do is give each of these drum instruments their own midi channel. I save it as a midifile, load it into the kn7 sequencer, adjust the velocities
Sequencer
Range Edit
Velocity Change
till I get the the drums sounding right, then I can merge them all back to track 10.
I have to do it via Velocity Change Not Via Volume on each of the tracks, because once they're merged back together into track 10 they take on a global volume for the track.

best wishes
Rikki