怎么样用声卡将数字波形直接输出为真实声音？不用wav文件的方式

2010-08-02 08:18:45 213 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

基于MATLAB的声音信号频谱分析仪设计 1．概述随着软硬件技术的发展，仪器的智能化与虚拟化已成为未来实验室及研究机构的发展方向[1]。虚拟仪器技术的优势在于可由用户定义自己的专用仪器系统，且功能灵活，很容易构建，所以应用面极为广泛。基于计算机软硬件平台的虚拟仪器可代替传统的测量仪器，如示波器、逻辑分析仪、信号发生器、频谱分析仪等[2]。从发展史看，电子测量仪器经历了由模拟仪器、智能仪器到虚拟仪器，由于计算机性能的飞速发展，已把传阅读详情

怎么样用声卡将数字波形直接输出为真实声音？不用wav文件的方式

现在有数字波形数据存放在数组aaa中，根据aaa中的数据，可以绘制出数字声音波形

现在要把aaa中的数据输出为真实的声音，不用转化为wav文件的方式，直接输出

有没有什么方法

...全文

c语言编程绘制动态波形,绘制wav波形图注：本文为原创，转载请注明出处。来自CSDN，作者：Midfar Sun 最近研究了如何在iOS上绘制wav波形图。查了很多资料，都没能找到一个很完整的介绍，我这里总结一下一些经验。首先需要了解wav的这3个重要指标：采样率、采样位数、声道数。下面以16KHz, 16Bit, 单声道为例来说明。采样率：(也称为采样速度或者采样频率)定义了每秒从连续信号中提取并组成离散信号的采样个数，单位用赫兹(H... 阅读详情

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wutaihua 2010-08-02

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《windows程序设计》第一版中有一章《声音与音乐》就是介绍这个的。下面是其中的一个例子。



SINEWAVE.C



#include <windows.h>  

#include <math.h>

#include "resource.h"

#define    SAMPLE_RATE   11025   

#define    FREQ_MIN 20   

#define    FREQ_MAX     5000  

#define    FREQ_INIT     440

#define    OUT_BUFFER_SIZE  4096

#define    PI    3.14159



BOOL CALLBACK DlgProc (HWND, UINT, WPARAM, LPARAM) ;

TCHAR szAppName [] = TEXT ("SineWave") ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{

   if (-1 == DialogBox (hInstance, szAppName, NULL, DlgProc))

    {

		MessageBox (  NULL, TEXT ("This program requires Windows NT!"),

		szAppName, MB_ICONERROR) ;



    }

   return 0 ;

}



VOID FillBuffer (PBYTE pBuffer, int iFreq)



{

   static double fAngle ;

   int  i ;

   for (i = 0 ; i < OUT_BUFFER_SIZE ; i++)

   {

	  pBuffer [i] = (BYTE) (127 + 127 * sin (fAngle)) ;

	  fAngle += 2 * PI * iFreq / SAMPLE_RATE ;

	  if (   fAngle > 2 * PI)

		fAngle -= 2 * PI ;

    }

}



BOOL CALLBACK DlgProc (    HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

{

   static BOOL bShutOff, bClosing ;

   static HWAVEOUT     hWaveOut ;

   static HWND hwndScroll ;

   static int  iFreq = FREQ_INIT ;

   static PBYTEpBuffer1, pBuffer2 ;

   static PWAVEHDR     pWaveHdr1, pWaveHdr2 ;

   static WAVEFORMATEX  waveformat ;

   int     iDummy ;

   

   switch (message)

   {

   case  WM_INITDIALOG:

		hwndScroll = GetDlgItem (hwnd, IDC_SCROLL) ;

		SetScrollRange(hwndScroll, SB_CTL, FREQ_MIN, FREQ_MAX, FALSE) ;

		SetScrollPos (hwndScroll, SB_CTL, FREQ_INIT, TRUE) ;

		SetDlgItemInt (hwnd, IDC_TEXT, FREQ_INIT, FALSE) ;

		

		return TRUE ;







   case   WM_HSCROLL:

	  switch (LOWORD (wParam))

	  {

			case   SB_LINELEFT:  iFreq -=  1 ;  break ;

			case   SB_LINERIGHT: iFreq +=  1 ;  break ;

			case   SB_PAGELEFT:  iFreq /=  2 ;  break ;

			case   SB_PAGERIGHT: iFreq *=  2 ;  break ;

			case   SB_THUMBTRACK:iFreq = HIWORD (wParam) ;break ;

			case   SB_TOP:GetScrollRange (hwndScroll, SB_CTL, &iFreq, &iDummy) ;break ;

			case   SB_BOTTOM:GetScrollRange (hwndScroll, SB_CTL, &iDummy, &iFreq) ; break ;

	  }

  

	  iFreq = max (FREQ_MIN, min (FREQ_MAX, iFreq)) ;

	  SetScrollPos (hwndScroll, SB_CTL, iFreq, TRUE) ;

	  SetDlgItemInt (hwnd, IDC_TEXT, iFreq, FALSE) ;

	  return TRUE ;



       



   case   WM_COMMAND:

	switch (LOWORD (wParam))

	{

	  case   IDC_ONOFF:

	 // If turning on waveform, hWaveOut is NULL

	 if (hWaveOut == NULL)

	{

		 // Allocate memory for 2 headers and 2 buffers

	   pWaveHdr1     = malloc (sizeof (WAVEHDR)) ;

	   pWaveHdr2     = malloc (sizeof (WAVEHDR)) ;

	   pBuffer1      = malloc (OUT_BUFFER_SIZE) ;

	   pBuffer2      = malloc (OUT_BUFFER_SIZE) ;





		 if (!pWaveHdr1 || !pWaveHdr2 || !pBuffer1 || !pBuffer2)

		{



			 if (!pWaveHdr1) free (pWaveHdr1) ;

			 if (!pWaveHdr2) free (pWaveHdr2) ;

			 if (!pBuffer1)  free (pBuffer1) ;

			 if (!pBuffer2)  free (pBuffer2) ;



			 MessageBeep (MB_ICONEXCLAMATION) ;

			 MessageBox (hwnd, TEXT ("Error allocating memory!"),

				 szAppName, MB_ICONEXCLAMATION | MB_OK) ;

			 return TRUE ;



		}





	  // Variable to indicate Off button pressed

		bShutOff = FALSE ;



	  // Open waveform audio for output



		  



		waveformat.wFormatTag= WAVE_FORMAT_PCM ;

		waveformat.nChannels= 1 ;

		waveformat.nSamplesPerSec       = SAMPLE_RATE ;

		waveformat.nAvgBytesPerSec  = SAMPLE_RATE ;

		waveformat.nBlockAlign       = 1 ;

		waveformat.wBitsPerSample       = 8 ;

		waveformat.cbSize    = 0 ;



		   



		if (waveOutOpen (&hWaveOut, WAVE_MAPPER, &waveformat,DWORD) hwnd, 0, CALLBACK_WINDOW)!= MMSYSERR_NOERROR)



		{



			free (pWaveHdr1) ;

			free (pWaveHdr2) ;

			free (pBuffer1) ;

			free (pBuffer2) ;





			hWaveOut = NULL ;



			 MessageBeep (MB_ICONEXCLAMATION) ;

			 MessageBox (hwnd, TEXT ("Error opening waveform audio device!"),szAppName, MB_ICONEXCLAMATION | MB_OK) ;

			return TRUE ;



		}





		// Set up headers and prepare them





		pWaveHdr1->lpData       = pBuffer1 ;

		pWaveHdr1->dwBufferLength       = OUT_BUFFER_SIZE ;

		pWaveHdr1->dwBytesRecorded      = 0 ;

		pWaveHdr1->dwUser       = 0 ;

		pWaveHdr1->dwFlags      = 0 ;

		pWaveHdr1->dwLoops      = 1 ;

		pWaveHdr1->lpNext       = NULL ;

		pWaveHdr1->reserved     = 0 ;



		waveOutPrepareHeader (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;

		pWaveHdr2->lpData       = pBuffer2 ;

		pWaveHdr2->dwBufferLength      = OUT_BUFFER_SIZE ;

		pWaveHdr2->dwBytesRecorded      = 0 ;

		pWaveHdr2->dwUser       = 0 ;

		pWaveHdr2->dwFlags      = 0 ;

		pWaveHdr2->dwLoops      = 1 ;

		pWaveHdr2->lpNext      = NULL ;

		pWaveHdr2->reserved     = 0 ;

		waveOutPrepareHeader (hWaveOut, pWaveHdr2, sizeof (WAVEHDR)) ;

	 }

		// If turning off waveform, reset waveform audio

	else

	{

		bShutOff = TRUE ;

		waveOutReset (hWaveOut) ;

	}

	 return TRUE ;

  }

  break ;

 // Message generated from waveOutOpen call



   case   MM_WOM_OPEN:

		SetDlgItemText (hwnd, IDC_ONOFF, TEXT ("Turn Off"));

		// Send two buffers to waveform output device

		FillBuffer (pBuffer1, iFreq);

		waveOutWrite (hWaveOut, pWaveHdr1, sizeof (WAVEHDR));

		FillBuffer (pBuffer2, iFreq);

		waveOutWrite (hWaveOut, pWaveHdr2, sizeof (WAVEHDR)) ;

		return TRUE ;

		 // Message generated when a buffer is finished



	case   MM_WOM_DONE:

		if (bShutOff)

		{

			waveOutClose (hWaveOut) ;

			return TRUE ;

		}





 // Fill and send out a new buffer





  FillBuffer (((PWAVEHDR) lParam)->lpData, iFreq) ;

  waveOutWrite (hWaveOut, (PWAVEHDR) lParam, sizeof (WAVEHDR)) ;

  return TRUE ;



   case   MM_WOM_CLOSE:

		waveOutUnprepareHeader (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;

		waveOutUnprepareHeader (hWaveOut, pWaveHdr2, sizeof (WAVEHDR)) ;

		free (pWaveHdr1);

		free (pWaveHdr2);

		free (pBuffer1);

		free (pBuffer2);



		hWaveOut = NULL ;

		SetDlgItemText (hwnd, IDC_ONOFF, TEXT ("Turn On")) ;



		if (bClosing)

			EndDialog (hwnd, 0) ;

		return TRUE ;



   case   WM_SYSCOMMAND:



  switch (wParam)

	{



	  case SC_CLOSE:



		 if (hWaveOut != NULL)

		{

			 bShutOff = TRUE ;

			 bClosing = TRUE ;

			 waveOutReset (hWaveOut) ;

		}

		 else

		 EndDialog (hwnd, 0) ;

		 return TRUE ;

  }

  break ;

  }

  return FALSE ;



}

IT_Young 2010-08-02

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有一系列的wav api函数，具体自己查吧。。。。。。

怎么样用声卡将数字波形直接输出为真实声音？不用wav文件的方式

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