The sensor array on the Litar has been designed to allow for the lowest latency and best accuracy possible when obtaining a string interaction. Each string has a specific geometry that allows them to be easy to play and makes them large enough to pluck.
The sensors are aligned in such a way that three sensors see a single string in space; two sensors define the string border and a third sensor obtains the string distance. This enures that you don't get miss plucks and it also allows the strings to be packed tighter together over one or two sensor setups (the sensors have a 25 degree field of view). To visualise this, the image below shows the sensor field of views, with the grey areas highlighting the virtual strings: