Simultaneous Audio Filtering

[eminemirhansener]

Hi,
I am trying to write a program that plots audio signal in time-frequency domain. Also apply filter and loop-back simultaneously. But the filtered audio is played intermittently.

Here is IWaveProvider class;

internal class MyWaveProvider : ISampleProvider
    {
        private ISampleProvider sourceProvider;
        private int cutOffFreq;
        private int channels;
        private BiQuadFilter[] filters;

        public MyWaveProvider (ISampleProvider sourceProvider, int cutOffFreq)
        {
            this.sourceProvider = sourceProvider;
            this.cutOffFreq = cutOffFreq;
            channels = sourceProvider.WaveFormat.Channels;
            filters = new BiQuadFilter[channels];
            CreateFilters();
        }

        private void CreateFilters()
        {
            for (int n = 0; n < channels; n++)
            {
                if (filters[n] == null)
                    filters[n] = BiQuadFilter.LowPassFilter(44100, cutOffFreq, 1);
                else
                    filters[n].SetLowPassFilter(44100, cutOffFreq, 1);
            }
        }

        public WaveFormat WaveFormat { get { return sourceProvider.WaveFormat;} }

        public int Read(float[] buffer, int offset, int count)
        {
            int samplesRead = sourceProvider.Read(buffer, offset, count);
            for (int i = 0; i < samplesRead; i++)
            {
                buffer[offset + i] = filters[(i % channels)].Transform(buffer[offset + i]);
            }

            return samplesRead;

        }

    }

and ApplyFilterOut Function;

        public void ApplyFilterOut()
        {
            var filtered = new MyWaveProvider(bwp.ToSampleProvider(), int.Parse(textBox1.Text));
            var waveOut = new WaveOut();
            waveOut.Init(filtered);
            waveOut.Play();
        }

Is there any solution or suggestion?