So far I only managed to do some preliminary research. The sound wasn't very good and I am not sure if I can manage to produce different sounds with the shinai or if every hit is just an unpleasant sharp "tick" regardless of what or how you hit.
It seems piezo elements need more electrical components to tune them properly, as well as a lot of post processing to make the sound it generates nice.
Hi. Is it possible to listen to the sound?