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国外近年推出的卡拉OK录像机与影碟机有不少具有魔术变调功能,如SHARP MV—K70X等。使用该功能可把演唱者的声音随心所欲地变成男声、女声或童声。如果用本文介绍的电路对您的伴唱机进行改装,定会为你带来不少生活情趣。电路如图。该变调电路应用了一块数字变声IC—RTS0071A来实现变调功能。RTS0071A是一块CMOS大规模集成电路,内含变调电路所需的音频放大器、比较器、A/D转换电路、D/A转换电路、存储器、逻辑调节电路和读写振荡器。所以外围电路十分简单,性能非常可靠。整个电路组装好后无需调试便可投入
In recent years, there are many karaoke video recorders and DVD players introduced in foreign countries that have magic tone adjustment functions, such as SHARP MV-K70X. Use this feature to change the voice of a singer into a male, female, or childish voice at will. If you use the circuit described in this article for your companion machine to be modified, will bring you a lot of fun life. Circuit shown in Figure. The modulation circuit uses a digital voice IC-RTS0071A variable tone function. The RTS0071A is a CMOS large scale integrated circuit that contains audio amplifiers, comparators, A / D conversion circuits, D / A conversion circuits, memories, logic conditioning circuits, and read / write oscillators needed for tone-modulating circuits. So the peripheral circuit is very simple, the performance is very reliable. After the entire circuit is assembled, it can be put into operation without debugging