Noise, when playing audio data

[Mint3]

Hi, I am trying to capture and play audio using Directshow.
I have captured the audio data using samplegrabber, but when I play the data it is giving only noise.

Here is the format of audio data.

m_Format = new WindowsMediaLib.Defs.WaveFormatEx();
m_Format.wFormatTag = 1; // PCM
m_Format.nChannels = 2; // Stereo
m_Format.nSamplesPerSec = 44100;
m_Format.wBitsPerSample = 8;
m_Format.nBlockAlign = (short)(m_Format.nChannels * (m_Format.wBitsPerSample / 8));
m_Format.nAvgBytesPerSec = m_Format.nSamplesPerSec * m_Format.nBlockAlign;
m_Format.cbSize = 0;
iRet = waveOut.Open(out m_pWave, 0, m_Format, IntPtr.Zero, IntPtr.Zero,WaveOpenFlags.None);
m_Buff = new WBuf(m_pWave, m_Format.nSamplesPerSec * (int)Math.Ceiling(4.0) * m_Format.nBlockAlign);

Here I am getting audio data and saving to saveAudio
public int BufferCB(double SampleTime, IntPtr pBuffer, int BufferLen)
{
// copying data to saveAudio
Marshal.Copy(pBuffer, saveAudio, 0, BufferLen);
//copying data to buffer
m_Buff.CopyDataToBuffer(saveAudio);
// writing data to play
waveOut.Write(m_pWave, m_Buff.GetPtr(), BufferLen);
return 0;
}

// Here is the code to copy audio data to buffer
public void CopyDataToBuffer(byte[] arrary)
{
int iOffset = 0;
IntPtr pBuff = m_Head.lpData;
for(int i=0; i<arrary.Length; i++)
{
Marshal.WriteByte(pBuff, iOffset, arrary[i]);
iOffset++;
}
}

Please tell me the mistake, I am doing.

[snarfle]

It looks like you are using a part DS and a part WM solution here. Is there
some reason for that? Did you try the RecordWav sample from WM?

[Mint3]

Hi snarfle, thanks a lot for your reply.
ya, I am using a part DS and a part WM. There is no reason for that.
I had used samplegrabber to capture images using DS, so I tried DS and I saw
generateLa example at windowsmedianet about audio, I tried merging both
examples to get work.
Actually I am a beginner in Directshow and trying to capture audio data at
real time and send over network to play other side.
I have done video part of capturing images and sending over network, and
currently trying to do audio part.
I am looking at RecordWav example, but it saves audio to a file instead of
memory.