0

到目前为止，我写道：

private AsioOut ASIODriver;
private BufferedWaveProvider buffer;

String[] drivernames = AsioOut.GetDriverNames();
ASIODriver = new AsioOut(drivernames[1]);
buffer = new BufferedWaveProvider(new WaveFormat(sampleRate, 16, 2));
ASIODriver.AudioAvailable += new EventHandler<AsioAudioAvailableEventArgs>(ASIODriver_AudioAvailable);
ASIODriver.InitRecordAndPlayback(buffer, 2, sampleRate);
ASIODriver.Play();

private void ASIODriver_AudioAvailable(object sender, AsioAudioAvailableEventArgs e)
{ 
    byte[] buf = new byte[e.SamplesPerBuffer * 4];
    for (int i = 0; i < e.InputBuffers.Length; i++)
    {
        Marshal.Copy(e.InputBuffers[i], buf, 0, e.SamplesPerBuffer * 4);
        Marshal.Copy(buf, 0, e.OutputBuffers[i], e.SamplesPerBuffer * 4);

        if (recorderOn && i == 1)
        {
            recorder.addInputToStream(buf);
        }
    }
}

这部分用于使用 ASIO 捕捉和播放吉他的声音。到目前为止没有问题。

public void addInputToStream(byte[] buffer)
{
    byte[] sample = new byte[buffer.Length / 4];
    if (waveWriter == null) waveWriter = new WaveFileWriter(@"C:\Temp\Test0001.wav", new WaveFormat(44100, 16, 1));
    for (int i = 0; i < buffer.Length; i = i + 4)
    {
        sample[i/4] = (byte)Convert.ToSingle(buffer[i] + buffer[i + 1] + buffer[i + 2] + buffer[i + 3]);
    }
    waveWriter.Write(sample, 0, sample.Length);
}

问题出现在方法addInputToStream中，声音很好地放在了.wav文件中，但文件中有很多“音频寄生虫”。很烦人。i我在调用该方法时尝试将变量更改为未使用Convert.ToSingle但结果相同。

我怀疑 of 有问题WaveFormat，waveWriter但我不知道我错过了什么。你们中的任何人都有线索吗？

4

1 回答 1

0

您需要创建一个 WaveFileWriter 并写出示例。这很简单，但我也花了一段时间才搞定。（注意：我没有设置 waveprovider，但你已经有了那个部分）。

 class AsioSample
{
    private NAudio.Wave.AsioOut _audioDevice;
    public WaveFileWriter AsioWaveFileWriter;
    public AsioSample()
    {
        //this is set for one channel
        AsioWaveFileWriter = new WaveFileWriter("sample.wav", new WaveFormat(48000, 1));
        _audioDevice = new NAudio.Wave.AsioOut(2);//or whatever
        _audioDevice.InitRecordAndPlayback(_waveProvider, 1, 48000);
        _audioDevice.AudioAvailable += new EventHandler<NAudio.Wave.AsioAudioAvailableEventArgs>(OnAudioAvailable);
        _audioDevice.Play();
    }

    private unsafe void OnAudioAvailable(object sender, NAudio.Wave.AsioAudioAvailableEventArgs e)
    {
        var floatsamples = new float[e.SamplesPerBuffer * e.InputBuffers.Length];
        e.GetAsInterleavedSamples(floatsamples);
        AsioWaveFileWriter.WriteSamples(floatsamples, 0, floatsamples.Length);
        AsioWaveFileWriter.Flush();
    }

}
于 2015-11-20T15:23:22.043 回答