sS getSoundURLCereproc(S text, S voice) {
  ret getSoundURLCereproc_raw(htmlencode(text), voice);
}

static S getSoundURLCereproc_raw(S text, S voice) ctex {
  S format = "mp3";
  
  S post = "<speakExtended key='2k4fhzwgr8eka9k9'><voice>" + htmlencode(voice) + "</voice><text>" + text + "</text><audioFormat>" + format + "</audioFormat>\n" +
"</speakExtended>";

  S url = "https://www.cereproc.com/livedemo.php";
  URL _url = new URL(url);
  URLConnection conn = _url.openConnection();
  conn.setRequestProperty("Content-Type", "text/plain;charset=UTF-8");
  conn.setRequestProperty("Accept", "*/*");
  conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
  conn.setRequestProperty("Accept-Language", "en-US,en;q=0.8,de;q=0.6");
  conn.setRequestProperty("Cookie", "has_js=1; _ga=GA1.2.1903717829.1455235694; Drupal.visitor.liveDemo=2k4fhzwgr8eka9k9");
  conn.setRequestProperty("Origin", "https://www.cereproc.com");
  conn.setRequestProperty("Referer", "https://www.cereproc.com/");
  conn.setRequestProperty("User-Agent", "Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/44.0.2403.89 Chrome/44.0.2403.89 Safari/537.36");
  
  conn.setDoOutput(true);
  
  //OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
  OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
  writer.write(post);
  writer.flush();
  
  S encoding = conn.getContentEncoding();
  //print("Encoding: " + encoding);
  
  S contentType = conn.getContentType();
  //print("Content type: " + contentType);

  byte[] response = loadBinaryPage(conn);
  //print("Bytes read: " + response.length);
  
  if ("gzip".equals(encoding))
    response = gunzipBinaryData(response);
    
  //print("Bytes unpacked: " + response.length);
  S s = new String(response, "UTF-8");
  //print(s);
  
  S oggUrl = null;
  L<S> tok = htmlcoarsetok(s);
  for (int i = 1; i < tok.size(); i += 2)
    if (isTag(tok.get(i), "url")) {
      oggUrl = tok.get(i+1);
      break;
    }
  if (oggUrl == null) fail("No sound URL found");
  ret oggUrl;
}

Began life as a copy of #1001273

Huh. What is the relation of this to makeSpeechCereproc?