SUPERTONIC-3 • English

English text to speech

Model: Supertonic-3 Acoustic Rate: 24 kHz Audio Containers: WAV / OGG Request Limit: 2,000 chars Script: Latin alphabet

English text to speech on Qefro Voice Studio uses one voice from Supertonic-3. Paste English text, generate, then download WAV, or OGG when the engine has ffmpeg. Speed and pitch are not available. Gujarati, Odia, and Urdu are separate languages this engine does not speak.

Try a English line

Hello. Welcome to Qefro Voice Studio. This longer passage is not only a short greeting. It tells a small scene so you can hear the pauses between sentences, the weight of the words, and the tone at the end. The morning market was waking slowly. The seller arranged fresh flowers, the smell of tea reached the lane, and the children looked back once before school. A good voice does not rush these pictures. After you listen, change two words and generate again.

Open Studio with English Voice

Real-world English voiceover scenarios

Tested production scripts for reels, tutorials, announcements, and telephony:

Social Reel Voiceover

High-retention social media hook

Here is something you probably did not know: one small idea can completely change how you see the world. Ready? Let us dive in.

Context / Translation: Narration hook designed for short-form video engagement.

Explainer & Tutorial

Product and software walkthrough

Welcome to the platform overview. In this quick guide, you will learn how to configure your account, generate your first audio asset, and deploy your project.

Context / Translation: Clear, measured tutorial pacing for technical products.

Store & Promo Announcement

Commercial brand announcement

Our annual creator summit is officially live! Join thousands of developers and artists exploring the future of generative media. Register today.

Context / Translation: Polished commercial tone for events and promotions.

Customer Care & IVR

Professional telephony phone menu

Thank you for calling Qefro Voice Studio support. For account inquiries, press one. To speak with a representative, please hold.

Context / Translation: Standard automated telephony greeting prompt.

Linguistic notes & pronunciation considerations

English synthesis uses the Supertonic-3 neural voice model, engineered for clear enunciation, natural sentence cadence, and realistic punctuation pauses. It handles abbreviations, web URLs, numbers, and currency symbols cleanly without awkward pauses.

How English speech is made

  1. Open the studio with English selected.
  2. Paste your English script. The engine limit is 2,000 characters per request.
  3. Click Generate voiceover and download the audio file directly in your browser.

Developer API cURL snippet

Automate English voiceover generation directly in your application backend:

curl -X POST https://voice.qefro.com/api/v1/tts   -H "Authorization: Bearer YOUR_API_KEY"   -H "Content-Type: application/json"   -d '{"text": "Here is something you probably did not know: one small idea can completely change how you see the world. Ready? Let us dive in.", "lang": "en", "format": "wav"}'   --output voiceover.wav

Frequently asked questions about English TTS

What model powers English text to speech in Qefro?

English voice synthesis is powered by the Supertonic-3 neural acoustic model, delivering broadcast-quality intonation and rhythm.

Can I download lossless WAV files for English voiceovers?

Yes. Lossless 16-bit PCM WAV audio is available immediately for download, alongside compressed OGG Vorbis.

How do I use the English speech synthesis API?

Subscribers to the API or API Plus plan can send HTTP POST requests to https://voice.qefro.com/api/v1/tts with a bearer key and JSON payload.

Can English speech be used for commercial projects?

Yes, subject to the model licensing terms. Full terms and details are documented on voice.qefro.com.

Other supported languages

Indic neural voices (VITS • 24 kHz)

Global neural voices (Supertonic-3)