使用带有SpeechSynthesizer的NAudio

Question

我想将NAudio和SpeechSynthesizer一起使用,但是如果不首先将.wav文件写入磁盘,我就无法工作.

我无法弄清楚为什么,我尝试了RAW wav数据和带标题的wav,请参阅以下示例.

我有以下示例:

示例1 - 这可以工作,但保存.wav文件

  using (var synth = new SpeechSynthesizer())
  {
    synth.SetOutputToWaveFile(@".\Test.wav");
    synth.Speak("This is sample text-to-speech output.");
    synth.SetOutputToNull();

    var reader = new WaveFileReader(@".\Test.wav");
    var waveOut = new WaveOut();
    waveOut.Init(reader);
    waveOut.Play();
  }

示例2 - 这也有效,但仍然使用文件

  using (var synth = new SpeechSynthesizer())
  using (var stream = new MemoryStream())
  {
    synth.SetOutputToWaveStream(stream);
    synth.Speak("This is sample text-to-speech output.");

    using (var fileStream = File.Create(@".\Test.wav"))
    {
      stream.Seek(0, SeekOrigin.Begin);
      stream.CopyTo(fileStream);
    }

    var reader = new WaveFileReader(@".\Test.wav");
    var waveOut = new WaveOut();
    waveOut.Init(reader);
    waveOut.Play();
  }

示例3 - 这不起作用,它只播放一小段时间并停止

我故意使用SetOutputToWaveStream来保留RIFF标题,以避免设置波形格式.

    using (var synth = new SpeechSynthesizer())
    using (var stream = new MemoryStream())
    {
      synth.SetOutputToWaveStream(stream);
      synth.Speak("This is sample text-to-speech output.");

      stream.Seek(0, SeekOrigin.Begin);
      var reader = new WaveFileReader(stream);
      var waveOut = new WaveOut();
      waveOut.Init(reader);
      waveOut.Play();
    }

实施例4-与实施例4相同的结果

这使用原始数据并且有点笨重.

  using (var synth = new SpeechSynthesizer())
  using (var stream = new MemoryStream())
  {
    synth.SetOutputToAudioStream(stream, new SpeechAudioFormatInfo(44100, AudioBitsPerSample.Sixteen, AudioChannel.Mono));
    synth.Speak("This is sample text-to-speech output.");

    stream.Seek(0, SeekOrigin.Begin);
    IWaveProvider provider = new RawSourceWaveStream(stream, new WaveFormat(44100, 16, 1));
    var waveOut = new WaveOut();
    waveOut.Init(provider);
    waveOut.Play();
  }

我也尝试过使用WasapiOut,但情况更糟.

Answer 1

您即将完成示例 3。Flush在重新定位到开头之前调用您的内存流。此外，Play仅开始播放，因此您需要等待播放完成或将WaveOut实例移至块之外using。否则，它只会在播放之前就被垃圾收集。