title: Which interpolation method to use for resampling speech signal?
body: <p>I want to do audio signal resampling (converting a signal with fs = 8 kHz to 16 kHz) using  MATLAB.</p>
  
  <p>There are 3 interpolation methods available : linear, pchip and spline </p>
  
  <p><a href="https://in.mathworks.com/help/signal/ref/resample.html#bungoxs" rel="nofollow noreferrer">https://in.mathworks.com/help/signal/ref/resample.html#bungoxs</a></p>
  
  <p>Which of them is most suitable for a speech signal and why?</p>