Описание метода API

$key = "11bcd1137ec5c94cc0d62256exxxxx";
$text = 'Привет мир!';
$voice = 'ru-RU001';
$pitch = '1.0';
$rate = '1.0';
$volume = '1.0';     
$hertz =  '44100';       
$format = 'mp3';

$url = "https://texttospeech.ru/api";
$post = "key=".$key.
        "&text=" . urlencode($text).
        "&voice=".$voice.
        "&pitch=".$pitch.
        "&rate=".$rate.
        "&volume=".$volume.    
        "&hertz=".$hertz.     
        "&format=".$format;

$ch = curl_init();
curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);

$response = curl_exec($ch);

curl_close($ch);

echo $response;