Voice + music speech synthesis series

This series of speech synthesis circuits are mainly used in toy products. It can adopt a mixed playback mode of voice and music. You can also use one channel (or multiple channels) to play voice. Another way (or multiple channels) to play music. The circuit power supply voltage is 2.4V~5V, the operating current is 500~1000uA, and the quiescent current is 1μA. The picture below is a typical application circuit diagram of HT3864. 8 pieces of music are stored internally. Controlled by KEYl~KEY8 keys respectively. The BS0 key controls the voice and music mixed playback output.