title: Can someone here has a sample of high pass filter for PCM audio data?
body: <p>Good day.
  I am poor of DSP. I have difficulties understanding the algorithm.
  I have a c# application, a recorder function that will record a sound waves
  but this sound is a mixture of all sounds. specifically, when i receive
  the data i will filter this data to save only the filtered audio data with high frequency, 
  example cutoff frequency is 15khz.
  For this filter, given are
   the samples of data with size,
  and the cutoff frequency</p>
  
  <p>C/C++ is fine</p>
  
  <p>At the time i received that samples of data, apply highpass filter then save the result to the wav. </p>
  
  <p>-thong</p>