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Upgrade TTS to ElevenLabs Adam voice with frontend integration

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- Switch speakText() to call /api/text-to-speech backend (ElevenLabs) with fallback to native speechSynthesis
- Upgrade ElevenLabs voice from Rachel to Adam (pNInz6obpgDQGcFmaJgB) — warmer, more professional
- Upgrade model from eleven_monolingual_v1 to eleven_turbo_v2_5 for better quality and lower latency
This commit is contained in:
Daniel Onyejesi 2026-03-21 20:55:50 -04:00
parent 4fc7f7f033
commit 64761c09fd
2 changed files with 34 additions and 10 deletions
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40
public/js/app.js
View file

@ -142,17 +142,41 @@ function speakText(elementId) {
if (!el) return;
var text = (el.innerText || el.textContent).trim();
if (!text) { showToast('Nothing to read', 'error'); return; }
if (!('speechSynthesis' in window)) { showToast('TTS not supported', 'error'); return; }
window.speechSynthesis.cancel();
var utter = new SpeechSynthesisUtterance(text);
utter.rate = 0.9;
utter.onend = function() { stopReading(); };
utter.onerror = function() { stopReading(); };
currentlyReadingId = elementId;
var btn = findReadButton(elementId);
if (btn) { btn.classList.add('btn-reading'); btn.innerHTML = '<i class="fas fa-stop"></i> Stop'; }
window.speechSynthesis.speak(utter);
showToast('Reading — click Stop to end', 'info');
// Try ElevenLabs backend first
var token = window.AUTH_TOKEN || localStorage.getItem('ped_scribe_token') || '';
fetch('/api/text-to-speech', {
method: 'POST',
headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token },
body: JSON.stringify({ text: text })
})
.then(function(r) {
if (!r.ok) throw new Error('not configured');
return r.blob();
})
.then(function(blob) {
var url = URL.createObjectURL(blob);
currentAudio = new Audio(url);
currentAudio.onended = function() { URL.revokeObjectURL(url); stopReading(); };
currentAudio.onerror = function() { URL.revokeObjectURL(url); stopReading(); };
currentAudio.play();
showToast('Reading — click Stop to end', 'info');
})
.catch(function() {
// Fallback to native speech synthesis
if (!('speechSynthesis' in window)) { stopReading(); showToast('TTS not supported', 'error'); return; }
window.speechSynthesis.cancel();
var utter = new SpeechSynthesisUtterance(text);
utter.rate = 0.9;
utter.onend = function() { stopReading(); };
utter.onerror = function() { stopReading(); };
window.speechSynthesis.speak(utter);
showToast('Reading — click Stop to end', 'info');
});
}
function stopReading() {

4
src/routes/tts.js
View file

@ -8,9 +8,9 @@ router.post('/text-to-speech', authMiddleware, async (req, res) => {
if (!process.env.ELEVENLABS_API_KEY) return res.status(400).json({ error: 'Not configured' });
const response = await axios({
method: 'POST',
url: 'https://api.elevenlabs.io/v1/text-to-speech/21m00Tcm4TlvDq8ikWAM',
url: 'https://api.elevenlabs.io/v1/text-to-speech/pNInz6obpgDQGcFmaJgB',
headers: { 'xi-api-key': process.env.ELEVENLABS_API_KEY, 'Content-Type': 'application/json' },
data: { text: req.body.text.substring(0, 5000), model_id: 'eleven_monolingual_v1', voice_settings: { stability: 0.5, similarity_boost: 0.75 } },
data: { text: req.body.text.substring(0, 5000), model_id: 'eleven_turbo_v2_5', voice_settings: { stability: 0.5, similarity_boost: 0.75 } },
responseType: 'arraybuffer'
});
res.set('Content-Type', 'audio/mpeg');