vb下的示波器，内涵自己写的傅立叶变换库、和音频处理功能。-vb under the oscilloscope, the connotation of the Fourier transform to write their own libraries, and audio processing capabilities.

VB开发的简单DWL声音频谱分析仪，也就是声音示波器，直接加载WAV文件或通过麦克风就可实时分析声音信息，并显示出声音频谱图。-VB to develop a simple spectrum analyzer DWL sound, that is, the voice of oscilloscope, load WAV files directly or through a microphone can be the voice of real-time analysis of informat