static Q cereproc_preload_q = startQ();

static volatile Pair<S> cereproc_preload_loading;

svoid cereproc_preload(fS voice, fS s) {
  cereproc_preload_q.add(r {
    cereproc_preload_loading = pair(voice, s);
    try {
      cereproc_silent(voice, s);
    } finally {
      cereproc_preload_loading = null;
    }
  });
}