static witAI_recognizeWAV(File wavFile) {
  ret witAI_recognizeWAV(wavFile, 'english);
}

static witAI_recognizeWAV(File wavFile, S language) {
  File mp3 = replaceExtension(f, "mp3");
  if (!mp3.exists())
    wavToMP3_128k(f, mp3);
  S text = witAI_recognizeMP3(mp3);
}