我正在使用以下代码使用 NAudio 读取麦克风:
WaveIn waveInStream;
WaveFileWriter waveFileWriter;
private void Form1_Load(object sender, EventArgs e)
{
waveInStream = new WaveIn();
waveInStream.DataAvailable += new EventHandler<WaveInEventArgs>(waveInStream_DataAvailable);
waveInStream.StartRecording();
waveFileWriter = new WaveFileWriter("D:\\output.wav", waveInStream.WaveFormat);
}
void waveInStream_DataAvailable(object sender, WaveInEventArgs e)
{
UInt64 allVals = 0;
for (int i = 0; i < e.BytesRecorded; i += 2)
{
allVals += (UInt64)(((int)e.Buffer[0] << 16) | ((int)e.Buffer[1]));
}
UInt64 avg = allVals / ((UInt64)e.BytesRecorded * 2);
avg /= 1000;
textBox1.AppendText(avg.ToString() + "\r\n");
waveFileWriter.Write(e.Buffer, 0, e.BytesRecorded);
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
waveInStream.StopRecording();
waveInStream.Dispose();
waveFileWriter.Close();
}
我对平均代码的工作不多。但我怀疑我是否使用正确的字节序正确构造了 16 位值。我尝试了两种方法,但我没有得到与房间声级成正比的值。