Also, some old rhythm boxes, like the Maestro Rhythm King, EKO Compurhythm or the Vox Percussion King, had a snare trigger that rolled when you held it down. This kind of tight loop especially needs round-robin, and I don't think the velocity approach would work.
I thought maybe I could set Shortcircuit's LFO to random, and somehow use that to trigger different samples. What do you think?

This screen shot on their website links an LFO to 'mm slot #4' but I don't know what that means. I would ask on their forum, but their forum and knowledge base appear to be offline.
