仅通过一个扬声器播放C ++音频

Question

我有＆＃39; ding.wav＆＃39;来自Windows系统文件夹的文件，我正在尝试使用C ++和OpenAL来播放它。我的问题是以下代码只能通过一个耳机/扬声器播放。任何人都可以发现问题吗？当我把它放在一个新项目中时，代码工作正常，但我无法理解为什么。

    alDevice = alcOpenDevice(alcGetString(NULL, ALC_DEFAULT_DEVICE_SPECIFIER));
    alContext = alcCreateContext(alDevice, NULL);
    alcMakeContextCurrent(alContext);

    alListener3f(AL_POSITION, 0.0f, 0, 1.0f);
    alListener3f(AL_VELOCITY, 0, 0, 0);
    ALfloat listenerOri[] = { 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f };
    alListenerfv(AL_ORIENTATION,listenerOri);

    alGenSources((ALuint)1, &alSource);
    alSourcef(alSource, AL_PITCH, 1);
    alSourcef(alSource, AL_GAIN, 1);
    alSource3f(alSource, AL_POSITION, 0, 0, 0);
    alSource3f(alSource, AL_VELOCITY, 0, 0, 0);
    alSourcei(alSource, AL_LOOPING, AL_FALSE);

    alGenBuffers(1, &alBuffer);
    alutLoadWAVFile("C:/ding.wav", &format, &data, &size, &freq, &loop);
    alBufferData(alBuffer, format, data, size, freq);
    alSourcei(alSource, AL_BUFFER, alBuffer);
    alSourcePlay(alSource);
    alGetSourcei(alSource, AL_SOURCE_STATE, &source_state);
    while (source_state == AL_PLAYING) {
        alGetSourcei(alSource, AL_SOURCE_STATE, &source_state);
    }