Capture Speech with DirectX - Problems

[CrazyPlaya]

Hi @ all,

I´m capturing speech with DirectSound.
The special at this capturing is that I need frames of 20ms to send to network.
Here I use the capture buffer from DirectSound.
Sending a Notification message and getting data from offset of the buffer.
The buffer himself has a size of 2560 bytes and the notify size is 640.
The buffer has 4 segments.
The way I do is not so correct I thought.
I get noises and breaks by fragmenting the buffer.
Here is the code of the Thread where Notification Message will be handled.

DWORD capturePos, readPos;
    m_captureBuffer->GetCurrentPosition(&capturePos, &readPos);
    DWORD diff;
    readPos >= m_NextOffset ?
        diff = readPos - m_NextOffset :
        diff = readPos + m_BufferSize - m_NextOffset;
        
    if(diff < m_NotifySize) return;
    
    //Lock the capture Buffer
    VOID* lockedBufferPointer = NULL;
    DWORD lockedBufferSize;
   
    m_captureBuffer->Lock(m_NextOffset, m_NotifySize, &lockedBufferPointer, &lockedBufferSize, NULL, NULL, 0L);
    //Put data to Output Sink
    const int SIZE = lockedBufferSize/2;
    //write to wave file
    write((BYTE*)lockedBufferPointer, lockedBufferSize);
   //edit the sample
    pSink->on_NewAudioDataCaptured((short*)lockedBufferPointer, SIZE);
    
    //Unlock the capture Buffer
    m_captureBuffer->Unlock(lockedBufferPointer, lockedBufferSize, NULL, 0);
       //Move the capture offset along
    m_NextOffset += lockedBufferSize;
    m_NextOffset %= m_BufferSize;

What could I do wrong here?

[CrazyPlaya]

Ok I have it. The fragment was to small with 20ms. Now i do it with 60ms and it sounds good.