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请教ezdsp5535附带的tests工程aic3204无声音问题



刚开始学习DSP C5535,使用开发板ezdsp5535。

在学习开发板附带测试工程aic3204时,第一个阶段aic3204_tone_headphone()放出的声音可以听到;

但是第二个阶段aic3204_loop_linein( ) 由麦克风传入声音再循环到耳机播放时耳机无任何声音。

问题描述如上,请各位老师指导。谢谢!