I do live drawing performances with the "Tagtool"-software (the old skool version: http://www.tagtool.org/wp/). It is a piece of software that allows you to draw using a drawing tablet and an arduino-based controller and animate these drawings live with a game controller (and project them as a performance).
Instead of using a arduino-based controller I wanted to use a KORG NanoKontrol2 MIDI-controller. I had seen a video of someone using the older version Nanokontrol which seemed to work fine and the Tagtool-software can easily be altered to run with MIDI.
I managed to hook up everything ok and could control the values of color, transparency, line-thickness, etc... with the sliders of the MIDI-controller like I expected. However, this only works when I move the sliders gently! When I move them too fast, the whole thing just freezes and none of the values can be moved. I have to restart the tagtool-program in order for it to work again.
I already posted this question to a forum dedicated to the Tagtool itself, but nobody seemed to have any idea what this could be, nor had they encountered this problem before (so it's not a known issue when using MIDI to control the Tagtool).
I have managed to find a workaround which solves my problem, but it is just a workaround and I still have no idea what is going on exactly...
In testing whether it was the Nanokontrol which was the problem or the software, I hooked it up to some other software which all seemed to work fine. No Freezing. At one point I used the MIDI-tester software MIDI-OX to see the values of the sliders and knobs. This worked fine too, no freezes. So I concluded the controller itself was ok.
But when I then started the Tagtool program again, this also worked perfectly! No more freezing whatsoever...
I shut everything down and started everything up again, and the freezing was back! What had happened? The first time I had left that MIDI-OX program running and the second time I didn't. So for some reason, as long as I keep MIDI-OX running in the background, I can fiddle those MIDI-knobs as fast as I can, no problem.
Of course, this is just a work around. I would be very interested to know what is actually happening here, and why the Tagtool freezes without the MIDI-OX.