使用NAudio录制音频时,向Google Cloud Speech发送字节数据

我正在创建一个简单的WinForms语音到文本应用程序。这个应用程序使用naudioapi监听麦克风,并将音频发送到googlecloudspeechapi。当googlecloudspeechapi用文本响应时,我会将文本附加到文本框中。参见以下代码:

async private void WaveIn_DataAvailable(object sender, WaveInEventArgs e)
{
    await Task.Factory.StartNew(()=> { WriteToTextBox(e.Buffer); }, TaskCreationOptions.LongRunning);
}
void WriteToTextBox(byte[] bufferData)
{
    var speech = SpeechClient.Create();
    var response = speech.Recognize(new RecognitionConfig()
    {
        Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
        SampleRateHertz = 16000,
        LanguageCode = "en",
    }, RecognitionAudio.FromBytes(bufferData));

    foreach (var result in response.Results)
    {
        foreach (var alternative in result.Alternatives)
        {
            textBox1.Text = textBox1.Text + " " + alternative.Transcript;
        }
    }
}

一切都很好除了 response.Results

var response = speech.Recognize(new RecognitionConfig()
            {
                Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
                SampleRateHertz = 16000,
                LanguageCode = "en",
            }, RecognitionAudio.FromFile("audio.raw"));

它工作得很好。