title: C# Real time waveform data plot using NAudio
body: <p>I am new on processing wav file and C#.My goal is to real time data plotting in waveform of wavfile.I mean while recording sound(wav) file,i want to plot its graph simultaneously.I searched some sound libiraries and decide to use NAudio.(Dont know it is the best choice for me.I am open to any suggestions about choosing audio libirary). However i have no idea about real time data plotting using sound. Some people suggest GDI but as i said i am new and i think it will take too much time to use GDI efficiently.If i must learn GDI,pls share any article that can help a beginner like me. Actually i look like dont know where should i start. Need to be guided :)) And i have a question.</p>
  
  <p>One of the tutorial of NAudio,he works with byte array to plot the waveform in Chart.It is fine if you know the size of wav file.However it works too slow and gives Out of Memory Exception for bigger wav files than 10mb.The code below refers to what i mean.</p>
  
  <pre><code>    OpenFileDialog open = new OpenFileDialog();
      open.Filter = "Wave File (*.wav)|*.wav;";
      if (open.ShowDialog() != DialogResult.OK) return;
      chart1.Series.Add("wave");
      chart1.Series["wave"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;
      chart1.Series["wave"].ChartArea = "ChartArea1";
      NAudio.Wave.WaveChannel32 wave = new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(open.FileName));
  
      byte[] buffer = new byte[426565];
      int read;
      while (wave.Position &lt; wave.Length)
      {
          read = wave.Read(buffer, 0, 426565);
          for (int i = 0; i &lt; read / 4; i++)
          {
              chart1.Series["wave"].Points.Add(BitConverter.ToSingle(buffer, i * 4));
          }
      }
  </code></pre>
  
  <p>Is there a way to perform this operation faster?</p>