avr单片机操作isd1720语音芯片的程序，经过测试，简单实用，内有详细注释和仿真,avr microcontroller operation isd1720 voice chip program, tested, simple and practical, there are detailed notes

ISD1720芯片实现录音,定点录音,播放,定点播放等.-ISD1720 audio chip, fixed-point recording, playback, such as fixed-point play.