Try the following sample code: videoGrabber->SetAudioDevice(idx); videoGrabber->SetRawAudioSampleCapture(TRUE); videoGrabber->SetOnRawAudioSample(g_OnRawAudioSampleCb); videoGrabber->StartAudioRendering();
It can be downloaded here (download the Lame 3.99 DirectShow filter) To install it, you have run the following command line (as administrator): regsvr32.exe lame.ax