title: Use libxtract or other small C, C++ library for VAD functionality
body: <p>I try to create speaker identification system on Android. Currently I'm using libxtract to calculate MFCC vector from frames and libsvm for classify.</p>
  
  <p>Do you have any idea how to use libxtract or other small C, C++ library that I can compile under NDK to detect voice (VAD Voice Activity Detection) in frames?</p>