对输入信号进行频谱分析，可以实现声音的即时采集并分析适合从事音频信号处理和分析。-Of the input signal spectral analysis, can achieve real-time voice fit to engage in collection and analysis of audio signal processing and analysis.

采集声卡的信号，并对声音信号进行fft分析，对如何获得声卡信号和简单的信号处理有帮助-it s a very good sample of processing sound card signal