| 摘要 |
PROBLEM TO BE SOLVED: To provide a switch scan device of an electronic musical instrument capable of suppressing a detection error of an on/off state of a switch due to crosstalk.SOLUTION: A switch scan device comprises: plural detection lines MK to which output terminals of plural switches SW are connected respectively; potential decision means for setting potential when the detection lines MK are in a high impedance state to predetermined second potential; and determination means which is a switch scan control part of an electronic musical instrument for detecting periodically an on/off state of the plural switches SW by activating the plural switches SW at the same time by a predetermined cycle and detecting potential of the plural detection lines MK, and determines the on/off state of the switches SW which was detected previously and that the switches SW are in the on state only when the previous detection result and the present detection result are the on state. |
