UE4 play ogg music file from hard disk

#include "FooActor42.h"
#include "MyFooActor.h"

AMyFooActor::AMyFooActor(const class FPostConstructInitializeProperties& PCIP)
: Super(PCIP)
{
    Box = PCIP.CreateDefaultSubobject<UBoxComponent>(this, TEXT("box"));

    sw = (USoundWave*)StaticConstructObject(USoundWave::StaticClass(), this, TEXT("MyTestSoundWave"));
    ac = PCIP.CreateDefaultSubobject<UAudioComponent>(this, TEXT("audio component"));

    sw->SoundGroup = ESoundGroup::SOUNDGROUP_Music;
    ac->bIsMusic = true;
    ac->bAutoActivate = false;

    loaded = FFileHelper::LoadFileToArray(rawFile, TEXT("D:\\my song.ogg"));

    Box->bGenerateOverlapEvents = true;
    Box->SetRelativeScale3D(FVector(5, 5, 5));

    if (loaded){
        Debug("loaded");

        FByteBulkData* bulkData = &sw->CompressedFormatData.GetFormat(TEXT("OGG"));
        bulkData->Lock(LOCK_READ_WRITE);
        FMemory::Memcpy(bulkData->Realloc(rawFile.Num()), rawFile.GetTypedData(), rawFile.Num());
        bulkData->Unlock();

        Debug("size: " + FString::FromInt(bulkData->GetBulkDataSize()));
        Debug("sw volume: " + FString::SanitizeFloat(sw->Volume) + " duration: " + FString::SanitizeFloat(sw->GetDuration()));
        Debug("sw MaxConcurrentPlayCount: " + FString::FromInt(sw->MaxConcurrentPlayCount) + " numchannels: " + FString::FromInt(sw->NumChannels));
        //volume 1.0 - duration 0.0 - NumChannels 0

        //FIXME need to find a way to set these parameters
        //sw->Duration = 10.0f;
        sw->NumChannels = 2;
        //Debug("sw detailed info: " + sw->GetDetailedInfo());

        ac->SetSound(sw);
        //Debug("ac detailed info: " + ac->GetDetailedInfo());
    }

    RootComponent = Box;

    Box->OnComponentBeginOverlap.AddDynamic(this, &AMyFooActor::TriggerEnter);
    Box->OnComponentEndOverlap.AddDynamic(this, &AMyFooActor::TriggerExit);
}

void AMyFooActor::TriggerEnter(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
{
    Debug("trigger enter");
    if (loaded){
        ac->Play();
    }

}
void AMyFooActor::TriggerExit(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
{
    ac->Stop();
    Debug("trigger exit");
}

void AMyFooActor::Debug(FString msg){
    if (GEngine){
        GEngine->AddOnScreenDebugMessage(-1, 1, FColor::Red, msg);
    }
}