static File voiceRSS_silent(S voice, S text) {
  text = voiceRSS_preprocess(text);
  ret voiceRSS_silent_preprocessed(voice, text);
}

static File voiceRSS_silent_preprocessed(S voice, S text) {
  File file = voiceRSS_file(voice, text);
  if (!file.exists()) {
    ifndef NoAWT
    O anim = miniLoadingAnim("Speaking...");
    endifndef
    try {
      S url = getSoundURLVoiceRSS(text, voice);
      loadBinaryPageToFile(url, file);
    } finally {
      ifndef NoAWT
      disposeWindow(anim);
      endifndef
    }
  }
  ret file;
}

Began life as a copy of #1005209