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sound_adc_capture
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sound_adc_capture/README.md

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    V1.0
        ADCSampleRate 24k
        ADCbit        24bit
        SPIRate       2M

ADC采样问题:

    1. ADC芯片和MCU之间总线速率无法大于2M, 否则ADC芯片初始时，会报CRC错误
    2. 采样率大于24k时，采集到的数据会出现错误，原因未知
    3. 单片机采集到语音偶尔会出现噪声（输入源是信号发生器），原因未知