Abstract: A stringed instrument wireless communication device includes a wireless communication device housing including a front; graphical elements on the front corresponding to data to be input into the wireless communication device; and a stringed instrument keypad including a plurality of frets extending along the front of the wireless communication device housing and a plurality of strings extending substantially perpendicular to and above the plurality of frets. The graphical elements are respectively disposed on the front between frets and adjacent to the strings, and the stringed instrument keypad is configured to input data corresponding to a pressed string and a graphical element adjacent to the pressed string.

Abstract: A jig is used in an assemblage between key sensors and an acoustic piano, and the jig has a shutter guide assembled with a casing of optical sensor array for aligning slits with target trajectories of shutter plates and pieces of adhesive double coated tape adhered to the shutter plates for aligning the shutter plates with associated white/black keys, wherein the shutter plates are inserted into the slits so that the shutter plates are placed on the target trajectories, and the white/black keys are moved along the target trajectories until they are brought into contact with the pieces of adhesive double coated tape for temporality tacking the shutter plates to the associated white/black keys.

Abstract: A violin shoulder cradle is provided for supporting a violin or similar stringed instrument on the shoulder of a musician. The cradle broadly includes a base for coupling adjacent the back of the violin body and a shoulder rest. The shoulder rest is contoured to substantially conform to the musician's shoulder while maintaining the desired substantially horizontal orientation of the violin along its longitudinal axis while in use. The outer surface of the shoulder rest is generally sloped from the remote edge toward the proximate edge inwardly toward the base, and includes a waist section which is closest the base, rising toward the first end in a plurality of steps.