| 摘要 |
PURPOSE:To make it possible to accomplish the base play either automatically or manually by interchanging a switch so that the key depression data of a key board or the automatic base sound data may be selected and fed to a musical sound generating circuit. CONSTITUTION:When a change-over switch 26 of an automatic-manual base place change-over circuit 13 is turned off, a gate 27 is opened through an inverter so that the auromatic base sound data are fed from au automatic base sound data generating circuit 25 through the gate 27 and an OR circuit 29 to a sound generating circuit 16 to simultaneously accomplish the automatic code play and the automatic base play. On the other hand, when the switch 26 is turned on, a gate 28 is opened so that the base automatic play is accomplished in accordance with the operation of a pedal key board 12. Thus, a complex automatic play can be accomplished by the selection of the automatic manual base play. |
