New Post: Recording into WaveStream and wave form

//this is one class

private WaveIn input = null;
private WaveFileWriter waveWriter = null;

public void StartRecord(int DeviceIndex, int sampleRate, int bits, int channels, string FileName)
{
   CloseAll(); ///disposes input and waveWriter

   input = new WaveIn();
   input.DeviceNumber = DeviceIndex;
   input.WaveFormat = new WaveFormat(sampleRate, bits, channels);
   input.DataAvailable += new EventHandler<WaveInEventArgs>(input_DataAvailable);
   waveWriter = new WaveFileWriter(FileName, input.WaveFormat);

   input.StartRecording();
   
}

private void input_DataAvailable(object sender, WaveInEventArgs e)
{
    if (waveWriter == null) return;
            
    if (OnVolumePeak != null) //onVolumePeak is my event
    {
        float max = 0;

        for (int index = 0; index < e.BytesRecorded; index += 2)
        {
            short sample = (short)((e.Buffer[index+1]<<8) | (e.Buffer[index]) );
            float sample16 = sample / 16384f;

            max = Math.Max(sample16, max);
        }

        OnVolumePeak(this, max);

    }
    waveWriter.WriteData(e.Buffer, 0, e.BytesRecorded);
    waveWriter.Flush();
}

//and part of code from another class:
public void OnVolumePeak(object Sender, float max)
{
    waveformPainter.AddMax(max); //paint waveForm 
    int vu = (int)Math.Round(max*100);
    if(vu > 100) vu = 100;
    PaintPB(vu);
}

//this one paints my volume meter
private void PaintPB(int value)
{
    Graphics gr = vmPanel.CreateGraphics();
    gr.Clear(this.BackColor);
            
    gr.FillRectangle(Brushes.Green, 0, 100 - value, vmPanel.Width, vmPanel.Height);
}