AkilesLima-bit

if ('speechSynthesis' in window) {
        let utterance = new SpeechSynthesisUtterance(texto);
        utterance.lang = 'pt-BR';
        utterance.rate = 1.2;
        window.speechSynthesis.speak(utterance);
} else {
    console.log("Web Speech API não suportada neste navegador.");
}

AkilesLima-bit

responsiveVoice.speak(texto, 'Brazilian Portuguese Female', {rate:1.2});