Can not run in android xamarin

[nanfei01055]

public bool OpenFile(WaveStream stream, double tempo = 1)
{
    Close();

    try
    {
        var inputStream = new WaveChannel32(stream) { PadWithZeroes = false };

        ProcessorStream = new SoundTouchWaveStream(inputStream);

        ProcessorStream.Tempo = tempo;

        _waveOut = new WaveOutEvent() { DesiredLatency = 200 };

        _waveOut.Init(ProcessorStream);
        _waveOut.PlaybackStopped += OnPlaybackStopped;

        return true;
    }
    catch (Exception exp)
    {
        // Error in opening file
        _waveOut = null;
        StatusMessage.Write("Can't open file: " + exp.Message);
        return false;
    }
}

Error:
_waveOut.Init(ProcessorStream); throw
winmm.dll assembly:<unknown assembly> type:<unknown type> member:(null)