Abstract: A sound reproduction program is provided which, in performing reading and sound reproduction of a musical score, precision of musical score recognition is improved. The sound reproduction program is stored in a terminal including the image pickup unit and a display unit and makes a computer execute a function of reading a musical score image at every predetermined time as a sampling image by a camera device, a function of detecting a staff in a simple manner from the sampling image, a function of displaying the sampling image and the simply detected staff in an associated manner on the display unit, a function of instructing detection of musical symbol information from the sampling image, a function of detecting the musical symbol information from the sampling image when the musical symbol information detection is instructed, and a function of emitting a sound based on the detected musical symbol information.

Abstract: A key top switch for an electronic musical instrument which can be manufactured at a low cost is provided for preventing noise due to bouncing between an operation panel and a key top, and permitting accurate and easy positioning of the key top at a predetermined position in the longitudinal direction and horizontal direction of the operation panel. The key top switch is disposed in an operation panel of an electronic musical instrument. The key top switch comprises a switch board attached on a back side of the operation panel, and a key top sandwiched between the operation panel and the switch board. The key top includes a contact member in contact with the switch board, and a resilient arm for urging the contact member toward the switch board.