A device, system and method for a musical instrument are disclosed herein. Thereby, the steering system can reduce the stead-state deviation and improve the stability in holding a steering angle both without any substantial compromise. This is accomplished by forming a difference in topography at the point where the opening of the upper electrode is to be made, and depositing a non-doped polysilicon layer on the upper electrode. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices. A plurality of diffusion paths in which attached liquid is diffused and flows are configured in the partition member, and a density of the partition member is a lower density than a density of the liquid holding material. A command is received to change a connection state of a free-space optical transmission path.