title: Read audio wav file and plot audio freq response smoothed in python
body: <p>I am working with python and would like to perform the following.  I have a wav audio file that I would like to read and plot frequency response for.  I am only interested in the time window of 3-4 seconds, not the entire file.  Also, I would like to resample my input file to 48k, instead of 192k which it comes in as.  </p>
  
  <p>I would like my plot to be with lines, of FFT length 8192, Hamming window, logx scale from 20 - 20k Hz.  </p>