| 摘要 |
PURPOSE:To provide automatic accompaniment function by providing a delay means having been set at the time width for judging that a plurality of keys are simultaneously turned OFF. CONSTITUTION:A delay element T2 which has been set at a delay time tau2 so that the time width tau2 for judging that a plurality of keys in a keyboard are simultaneously OFF is kprovided, whereby some parts out of the keys touched when a plurality of keys are being touched are turned OFF and when the time of tau2 elapsed, the ON-OFF states of the respective keys at the time when said tau2 elapsed are respectively stored in the memory devices corresponding to the respective keys. A delay element T1 having been set at a delay time tau1 so that the time width tau1 for discriminating whether the same keys in the keyboard are retouched after having been once touched or not from being set to OFF state is provided. |
