WASAPI iAudioRender iAudioCapture, запись в файл

#include <endpointvolume.h>
#include <iostream>
#include <Audioclient.h>
#include <audioengineendpoint.h>
#include <fstream>
 
 
void iaudio_get()
{
    HRESULT hr;
    IAudioClient* ac;
    WAVEFORMATEX* pwfx;
    IMMDeviceEnumerator* immde = NULL;
    IAudioRenderClient* arc;
    UINT32 buffer;
    IAudioCaptureClient* capt = NULL;
    u_int buf_frames;
 
    int buffer_length_msec = 500;
    REFERENCE_TIME dur = buffer_length_msec * 1000 * 10;
 
 
    CoInitialize(NULL);
 
    IMMDeviceEnumerator* deviceEnumerator = NULL;
    hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID*)&deviceEnumerator);
    if (FAILED(hr))std::cout << " CoCreateInstance" << std::endl;
    
    IMMDevice* defaultDevice = NULL;
    hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &defaultDevice);
    if (FAILED(hr))std::cout << " defaultDevice->Activate" << std::endl;
 
    hr = defaultDevice->Activate(__uuidof(IAudioClient), CLSCTX_INPROC_SERVER, NULL, (LPVOID*)&ac);
    if (FAILED(hr))std::cout << " defaultDevice->Activate" << std::endl;
 
    hr = ac->GetMixFormat(&pwfx);
    if (FAILED(hr))std::cout << " fail GetMixFormat" << std::endl;
 
    hr = ac->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_LOOPBACK, dur, dur, pwfx, NULL);
    if (FAILED(hr))std::cout << " fail initialize failed" << std::endl;
 
    hr = ac->GetBufferSize(&buf_frames);
    if (FAILED(hr))std::cout << " fail buffer size" << std::endl;
    
    hr = ac->GetService(__uuidof(IAudioCaptureClient), (void**)&capt);
    if (FAILED(hr))std::cout << " GetService" << std::endl;
 
 
    BYTE* data;
    std::ofstream fout;
    fout.open("stream.txt", std::ios::app);
 
    ac->Start();
 
    for (int r = 0;r<500;r++) {
 
        UINT32 nframes;
        DWORD flags;
        hr = capt->GetBuffer(&data, &nframes, &flags, NULL, NULL);
 
        if (hr == AUDCLNT_S_BUFFER_EMPTY) {
            Sleep(100);
            continue;
        }
 
        capt->ReleaseBuffer(nframes);
        std::cout << data << std::endl;
        fout << data;
    }
    std::cout << "end get iaudio" << std::endl;
    CoTaskMemFree(pwfx);
    ac->Stop();
}

fout.open("stream.txt", std::ios::app | std::ios::binary);