New Post: saving a mix file with an effect

I am trying to save a mix file. It works, but not when I add an effect to the mix.
it throws an error because the file goes to 2 Gb.

I do not know why.
I read in a file and I changed the volume in it and then I add it to a mix and try to save it.
but it does not stop. after this I can play the file but it is like 2.49 hours long. but the 1st part of the file in right...

I do not understand, I can play the mix with the effect and it works right. it even stop when is it done...

but why with I try and write it, it does not?
this is my code:

                MixingSampleProvider mixernew = new MixingSampleProvider(WaveFormat.CreateIeeeFloatWaveFormat(44100, 2));

                try
                {

                    for (int y = 0; y < file.Count; y++)
                    {
                        audioFileReader = new AudioFileReader(file[y]);
                        mixernew.AddMixerInput((ISampleProvider)audioFileReader);

                    }

                    if (effectflat == true)
                    {
                        for (int i = 0; i < stream.Count; i++)
                        {
                            mixernew.AddMixerInput(stream[i]);
                        }

 
                    }
                   
                    SampleToWaveProvider mixer3 = new SampleToWaveProvider(mixernew);
                 
                    SaveFileDialog save2 = new SaveFileDialog();
                    save2.Filter = "Wave file (*.wav)|*.wav;";
                    if (save2.ShowDialog() != DialogResult.OK) return;

                        WaveFileWriter.CreateWaveFile(save2.FileName, mixer3);
                  
                }
                catch (Exception)
                {
                    MessageBox.Show("error file not mad");
                }
                MessageBox.Show("File Saved");

I am about done with a program I am working on and this is the last part I need help with
can someone please help me?

this is the effect file:

using System;
using System.IO;
using System.Collections.Generic;

using NAudio.Wave;

namespace Isochronic_tones_generator
{
    public class EffectStream : WaveStream 
    {
        public WaveStream SourceStream { get; set; }

        public List<IEffect> Effects { get; private set; }
        static int counter;
        public EffectStream(WaveStream stream)
        {
            this.SourceStream = stream;
            this.Effects = new List<IEffect>();
            number = 1;
            counter = 0;
        }

       public float number  { get; set; }
        public override long Length
        {
            get { return SourceStream.Length; }
        }

        public override long Position
        {
            get
            {
                return SourceStream.Position;
            }
            set
            {
                SourceStream.Position = value;
            }
        }

        public override WaveFormat WaveFormat
        {
            get { return SourceStream.WaveFormat; }
        }

        public override int Read(byte[] buffer, int offset, int count)
        {
            Console.WriteLine("DirectSoundOut requested {0} bytes", count);

            int read = SourceStream.Read(buffer, offset, count);

            for (int i = 0; i < read / 4; i++)
            {
                float sample = BitConverter.ToSingle(buffer, i * 4);
                sample = sample * number;

                byte[] bytes = BitConverter.GetBytes(sample);

                //bytes.CopyTo(buffer, i * 4);

               buffer[i * 4 + 0] = bytes[0];
                buffer[i * 4 + 1] = bytes[1];
                buffer[i * 4 + 2] = bytes[2];
                buffer[i * 4 + 3] = bytes[3]; 
            }
         
            return read;
        }
    }
}