Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions

摘要: A musical apparatus which outputs music under the control of various instructions where desired are reliably determined by movement an object in operation space, and varied changing state motion space. The performs whose contents based on within a specified may have at least one light source shines into said sensor receives has been reflected space so that it two paths reach from to via object, detection values is output according quantity received respective paths, controller controls function when correlation between current satisfies relationship.