Google speech API и Java

Path path= Paths.get("E:/Test/good.flac");
        byte[] data = Files.readAllBytes(path);
        URL url=new URL("https://www.google.com/speech-api/v2/recognize?xjerr=1&client=chromium&lang=en-US&maxresults=10");
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.setInstanceFollowRedirects(false);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "audio/x-flac; rate=8000");
        connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36");
        connection.setConnectTimeout(10000);
        connection.setUseCaches (false);
 
        DataOutputStream outputStream=new DataOutputStream(connection.getOutputStream());
        outputStream.write(data);
        outputStream.flush();
        outputStream.close();
        connection.disconnect();
 
        BufferedReader reader=new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String str;
        while((str=reader.readLine())!=null){
            System.out.println(str);
        }
 
    }

Server returned HTTP response code: 400 for URL: [url]https://www.google.com/speech-api/v2/recognize?xjerr=1&client=chromium&lang=en-US&maxresults=10[/url]
 
IOException: Error writing to server

 URL url=new URL("https://www.google.com/speech-api/v2/recognize?output=json&lang=en-US&key="+key);