For a kick drum you should use drum replacer. It has a simple to use slider where you can see the transients and quickly get a good setting.
I haven't figured out how you turn it into a midi file yet but there is a few kick samples built in that might work for you.
I tried the melodyn drag and drop on a real snare track. There was no bleed I played it solo. It created about 6 lanes of midi notes. I figure there's a dialog somewhere to set it for percussion but it doesn't pop up when you do the quick drag and drop.
But drum replacer seems to work it just then at this point I'm stuck with it's built in sounds. So time to RTFM.