如何从默认音频设备录制和播放音频

Question

我似乎无法从默认音频设备录制音频，并在另一个音频设备上播放.. 我不想录麦克风，但音频设备..

当我播放电影时，我可以通过耳机听到声音，我想将声音复制到我选择的任何音频设备中。

如果您有任何建议，不一定非要与NAudio..

据我所知，NAudio 做不到。

这是我目前用于任务的代码，但它只接受来自我的麦克风的输入：Code sn-p with NAudio..

void playSoundCopy(int dv0)
{
    disposeWave0();// stop previous sounds before starting
    var waveOut0 = new WaveOut();
    waveOut0.DeviceNumber = dv0;
    wave0 = waveOut0;

    Defaultwave0 = new WaveIn();
    Defaultwave0.DeviceNumber = (int)GetDefaultDevice(Defaultdevice.FriendlyName);
    var waveinReader0 = new WaveInProvider(Defaultwave0);
    wave0.Init(waveinReader0);

    play0 = false;
    Thread.Sleep(1000);

    play0 = true;
    t0 = new Thread(() => { timeline0(); });
    t0.IsBackground = true;
    t0.Start();

    Defaultwave0.StartRecording();
    wave0.Play();
}

真正的问题实际上是我无法从 WaveOut 设备录制，只能从 WaveIn..

工作结果：

void playSoundCopy(int dv0)
{
    disposeWave0();// stop previous sounds before starting
    var waveOut0 = new WaveOut();
    waveOut0.DeviceNumber = dv0;
    wave0 = waveOut0;

    var format0 = Defaultdevice.AudioClient.MixFormat;
    buffer0 = new BufferedWaveProvider(format0);
    wave0.Init(buffer0);

    capture = new WasapiLoopbackCapture(Defaultdevice);
    capture.ShareMode = AudioClientShareMode.Shared;
    capture.DataAvailable += CaptureOnDataAvailable;

    play0 = false;
    Thread.Sleep(1000);

    play0 = true;
    t0 = new Thread(() => { timeline0(); });
    t0.IsBackground = true;
    t0.Start();

    capture.StartRecording();
    wave0.Play();
}
void CaptureOnDataAvailable(object sender, WaveInEventArgs waveInEventArgs)
{
     try
     {
         var itm = new byte[waveInEventArgs.BytesRecorded];
         Array.Copy(waveInEventArgs.Buffer, itm, waveInEventArgs.BytesRecorded);
         buffer0.AddSamples(itm, 0, itm.Length);
     }
     catch { }
}

Answer 1

您可以使用WasapiLoopbackCapture 捕获发送到设备的音频。然后您可以将其通过管道传输到BufferedWaveProvider 并使用它来提供另一个输出设备。不过会有一些延迟，所以不要指望这两个设备会同步。