public int Read(float[] buffer, int offset, int count)
        {
            int samplesRead = source.Read(buffer, offset, count);
            // TODO: examine and optionally change the contents of buffer

            stereo2mono(ref buffer);

            return samplesRead;
        }

        private void stereo2mono(ref float[] buffer)
        {
            for (int i = 0; i < buffer.Count(); i = i + 2)
            {
                float temp = buffer[i] + buffer[i + 1];
                buffer[i] = temp / 2;
                buffer[i + 1] = temp / 2;
            }
        }