This example uses a KSDATAFORMAT_WAVEFORMATEX structure to describe the data format of a PCM stream.
DataFormat.FormatSize = sizeof(KSDATAFORMAT_WAVEFORMATEX); DataFormat.Flags = 0; DataFormat.SampleSize = 0; DataFormat.Reserved = 0; DataFormat.MajorFormat = STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO); DataFormat.SubFormat = STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM); DataFormat.Specifier = STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX); Format.wFormatTag = WAVE_FORMAT_PCM; Format.nChannels = 2; Format.nSamplesPerSec = 44100; Format.nAvgBytesPerSec = 176400; Format.nBlockAlign = 4; Format.wBitsPerSample = 16; Format.cbSize = 0;