I finally managed to get them working. After i found a card image by accident, the software part was over fast. Assembly ws a bit tricky and one of the 3d printed parts was cheap quality. But in the end, after about 2 month and way too much money, it is done.
Now I got to see how I use them in Touchdesigner and so on.
If that works as I want it to work I will try video/sound manipulation in stereo. Might also help with my own music videos.
