NIOS2 实现音频代码,录音，听到声音-NIOS2 Audio

通过altera开发板DE2_70实现语音记录与播放，添加FIR滤波器提升语音质量。附加硬件功能方框图以及软件流程图，以及改进方法。-By altera board DE2_70 voice recording and playback, added FIR filter to enhance the voice quality. Additional functional block diagram of the hardware and software flow chart, as wel

DE2-115开发板的音频播放器的设计。使用Altera的NIOS2嵌入式处理器核实现。软件使用版本要求Quartus2 10.0以上。-The design of audio player based on DE2-115 developer board.