| 摘要 |
PURPOSE:To send effect sound with simple circuit constitution without special provision of an acoustic device by providing a means for generating/inputting a digital data and connecting a digitized voice signal and digital data to a line while being switched. CONSTITUTION:When a switch 12 is closed, the level of a signal line 12a goes to an L level and the digitized melody tone obtained from a signal line 10a is sent to a line 4a from a multiplexer 11 via a signal 11a. In opening the switch 12, the level of the signal line 12a goes to an H level and the multiplexer 11 selects a digital voice signal obtained from a signal line 3b. The signal is sent to the line 4a via an interface circuit 4. Thus, the switch 12 selects either the voice signal or the melody tone and the result is sent to the line 4a. |
