Генератор частот. Осталось немного доработать

#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>
#include <math.h>
 
const int nSPS = 44100; // частота дискретизации
const int nBits = 16;  // разярядность
const int nCannal = 2;  //
const int nSeconds = 8;
const int nSamples = nSPS * nSeconds ;
const int nBytes   = nSamples * nBits / 8;
const int F = 300; // частота звука
 
void CALLBACK waveOutSin(
  HWAVEOUT hwo,
  UINT uMsg,
  DWORD dwInstance,
  DWORD dwParam1,
  DWORD dwParam2){
  }
 
  int main(void){
  short Buffer[nSamples];
 
  for (int i = 0; i < nSamples; i++)
  {
    Buffer[i] = (20000*sin(2*M_PI*F*(i)/(nSPS)));
  }
 
  WAVEFORMATEX wfx;
  wfx.wFormatTag = WAVE_FORMAT_PCM;
  wfx.nChannels = nCannal;
  wfx.nSamplesPerSec = nSPS;
  wfx.wBitsPerSample = nBits;
  wfx.nBlockAlign = wfx.nChannels * wfx.wBitsPerSample / 8;
  wfx.nAvgBytesPerSec = wfx.nBlockAlign * nSPS;
  wfx.cbSize = 0;
 
  HWAVEOUT hwo;
  MMRESULT mmresult = waveOutOpen(&hwo, WAVE_MAPPER, &wfx, (DWORD)waveOutSin, 0, CALLBACK_FUNCTION);
 
  WAVEHDR whdr;
  whdr.lpData = (LPSTR)Buffer;
  whdr.dwBufferLength = nBytes;
  mmresult = waveOutPrepareHeader(hwo, &whdr, sizeof(whdr));
 
  waveOutSetVolume(hwo, 0xFFFF);
  mmresult = waveOutWrite(hwo, &whdr, sizeof(whdr));
 
  getchar();
 
  waveOutClose(hwo);
 
  return 0;
}