| 摘要 |
The addresses of memory positions in a RAM stored with a series of tone data corresponding to a preselected musical piece, are sequentially stepped by a backward key or a forward key in the backward or forward direction, and the tone corresponding to the tone data stored in a stepped address is generated, for each actuation of the corresponding key, under the control of CPU. Upon actuation of a delete key, the tone corresponding to the tone data stored in an address preceding the currently stepped address by one, is generated through the controlling operation of the CPU. Subsequently, the tone data stored in an address succeeding by one the current address is written into that address, and the tone data of the addresses succeeding the address having its content written are sequentially shifted by one address in the backward direction, respectively.
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