title: How to record to .wav from microphone after applying fast fourier transform and a high pass filter on it?
body: <p>I receive input from the microphone and I apply the fft on it.
  After that, I put frequencies higher than 1KHz with zero (the high pass filter).</p>
  
  <p>I want to know how can I record the input from microphone after I passed it to fft and after the application of the high pass filter.</p>
  
  <p>I'm working with c#, what do I need to do? :P</p>