| 摘要 |
PURPOSE:To obtain the synthesized sounds which are nearly natural by changing the time constant of the envelope signal of the one sound generated in synchronization with the generation timing of one piece of the acoustic data in synchronization with the generation timing of the subsequent acoustic data and subjecting this acoustic data to envelope processing. CONSTITUTION:Start signals P1 to P3 of the generation timing of the acoustic data and timing signals T1 to T3 are supplied from a control circuit 5 to a time constant circuit 4. The previously stored acoustic data are read out of ROMs 1 to 3 according to the values counted by counters 6 to 8. The outputs from the ROMs 1 to 3 are respectively subjected to D/A conversion by D/A converters 9 to 11 and are simultaneously subjected to the envelope processing by the envelope signals E1 to E3 from the time constant circuit 4. The outputs of the D/A converters 9 to 11 are synthesized in a mixing circuit 12 and sounds are released from a speaker 14 via an amplifier 13. The plural sounds are synthesized to the natural synthesized sounds in this way. |
