Extracting Sound from Google Translate

For many years I extracted sound from google.translate.com using Chrome DevTools and the Network tab. When clicking the sound button in the Network tab, an mp3 file appears. I just clicked and downloaded the file for educational purposes.

Now, there are only XHR type files with countless character sequences inside square brackets like strings in JS arrays. The page itself is quite complicated.

How can I extract sound under the new circumstances?

• Somehow extract from XHR files?
• Maybe some way to record using the GNU/Linux sound system?
• Or something else?

php code doing this:

<?php

$lang = 'en';
$text = 'hello world';

$curl = curl_init();
curl_setopt_array($curl, [
    CURLOPT_URL => 'https://translate.google.com/_/TranslateWebserverUi/data/batchexecute',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS => http_build_query([
        'f.req' => json_encode([
            [
                [
                    'jQ1olc',
                    json_encode([
                        $text,
                        $lang,
                        null,
                        json_encode(null),
                    ]),
                    null,
                    'generic',
                ]
            ]
        ]),
    ]),
]);
$response = curl_exec($curl);
curl_close($curl);
if ($response && preg_match('#//NE[^\\\\]+#', $response, $matches)) {
    file_put_contents('test.mp3', base64_decode($matches[0]));
}
else {
    echo "error\n";
}