能够读取wav格式的音频文件

				// Signal.h: interface for the CSignal class.
				//
				//////////////////////////////////////////////////////////////////////
				
				#if !defined(AFX_SIGNAL_H__5D1649F9_2E85_4E47_B71D_35F1AE8DE8A4__INCLUDED_)
				#define AFX_SIGNAL_H__5D1649F9_2E85_4E47_B71D_35F1AE8DE8A4__INCLUDED_
				
				#if _MSC_VER > 1000
				#pragma once
				#endif // _MSC_VER > 1000
				
				class CSignal  
				{
				public:
					int signalkind;
					int bufferkind;
					PBYTE m_pAfter;
					WORD cbSize;
					PBYTE m_pcurbuffer;
					PBYTE m_pSavebuffer;
					DWORD dwDatalength;
					DWORD dwTotalDatalength;
					WORD wBitsPerSample;
					WORD nBlockAlign;
					DWORD nAvgBytesPerSec;
					DWORD nSamplesPerSec;
					WORD nChannels;
					WORD wFormatTag;
					CSignal();
					virtual ~CSignal();
				
				};
				
				#endif // !defined(AFX_SIGNAL_H__5D1649F9_2E85_4E47_B71D_35F1AE8DE8A4__INCLUDED_)