Piano technique is one of the main part of piano playing. Some researches had
attempted to unveil the technique of virtuoso pianists using technologies. These
researches employ different types of sensors in order to capture motion data of piano
playing. However, one area in this research had been under-represented, which is
finger position and pressure measurement applied by the musician while playing the
musical instrument. Research that embark on this area faced a common problem, the
sensors used in these research are directly in contact with the pianist, which causes a
change of piano playing experience. Since piano playing consists of very delicate
interaction between the pianist and the piano, such change of experience may affect
the pianist’s performance. These sensors are considered to be intrusive to the piano
playing experience. Concluding the challenges faced by current technologies, a nonintrusive
sensor is proposed and the circuit design of the sensor is discussed in this
paper.