static int cereproc_maxChars = 1000;

static File cereproc(S voice, S text) {
  text = cereproc_preprocess(text);
  if (empty(text)) null;
  print("[" + voice + "] " + text);
  File file = cereproc_silent_preprocessed(voice, text);
  if (file != null) playMp3(file);
  ret file;
}