Hi, been using freedrum for somewhile, and I believe it is an amazing breakthrough!
However, keeping aside latency and other issues, I have been facing a different issue. Seems like everytime I calibrate the drumsticks and start playing , the reference angle and positioning changes depending on my resting arm position. To put it in a different way, ideally it should react based on the angular positions and plane. But after a while of playing where the snare should be located turns into ride. so, essentially needing to recalibrate again and play more consciously with minimal spatial change.
A point to devs, I think if the sensors be aligned with the foot sensors so that they remember their relative angle and position it would prevent that. Since the foot sensors are almost fixed in their position.
just my thoughts.