// optional parameter: bool useKnownPlaces
sS deepspeech(File audioFile, O... _) {
  if (isRIFFFileByContent(audioFile) &&
    eq(wavSampleRateAndChannels(audioFile), pair(16000f, 1)))
    // assuming 16 bit
    ret deepspeech_recognize16KWav(audioFile, _);
    
  optPar bool useKnownPlaces;
  File wav = useKnownPlaces ? javaxCachesDir("16k-for-deepspeech.wav") : createTempFileWithExtension(".wav");
  temp useKnownPlaces ? null : tempDeleteFile(wav);
  print("Converting " + audioFile + " to 16k WAV");
  ffmpeg_toMonoAudio_16k(audioFile, wav);
  ret deepspeech_recognize16KWav(wav, _);
}

sS deepspeech(S f, _) {
  ret deepspeech(newFile(f), _);
}