| 摘要 |
PURPOSE:To generate musical sounds by providing a plurality of wave-form selecting and indicating means so that the selected reference wave-forms are composed and that the plural reference wave-forms are digitally composed. CONSTITUTION:When the signals detecting the maximum value of the attach condition are fed to an addition and subtraction conrtol circuit 39 by an envelope value detecting circuit 41, a release condition is set. Under this condition, the subtraction is carried out by a maximum counted value 15 until the 0 value is detected by the circuit 41. An Fd memroy 17 is made operative to store the 1 signals in correspondence with the line memory during the operation of the envelope memory 15 so that it is controlled by the delay indicating signals and rise clock signals phis from a musical sound control circuit 24. The output of the final line memory of the envelope memory 15 is also fed to a comparator circuit 36. In this circuit 36, the comparison is made between the four bits of an address memory 13 and the four bit output of the memory 15 so that the coincidence detecting signals and the front and rear half coincidence detecting signals are generated. |
