Text to Speech with Pronunciation Control

Every word pronounced exactly right

Resemble AI generates multiple pronunciation variants and lets you build a custom vocabulary — so your TTS never mispronounces a word again.

Available for
Chatterbox Chatterbox Turbo

Three steps to perfect pronunciation

1

Multiple variants generated

Our engine automatically produces several pronunciation candidates for every word — especially tricky brand names, drug names, and domain-specific terms.

2

Pick the correct one

Listen to each variant and select the pronunciation that matches your standard. One click to lock it in — no phonetic transcription required.

3

Build your vocabulary

Approved pronunciations are saved to a reusable vocabulary that applies across all future synthesis. Every voice, every request — consistently correct.

custom_vocabulary.json
Word
Selected Variant
Status
Calquence
variant-03
Locked
Mounjaro
variant-01
Locked
durvalumab
variant-02
Locked
empagliflozin
variant-05
Locked
100%

Pronunciation accuracy

Once a vocabulary is built, every word is pronounced the same way every single time — across voices, sessions, and API calls. No regression, no surprises.

Built for industries where words matter

Pharmaceutical & Life Sciences

Drug names, compound identifiers, and clinical terminology must be pronounced with precision. A mispronounced drug name in a patient-facing application can damage trust or worse.

drug monographs patient medication guides clinical trial briefings IVR pharmacy systems

AI Health Agents

Agentic AI platforms running thousands of real-time patient conversations including medication reminders, post-discharge follow-ups, and care coordination cannot afford to mispronounce a single drug or treatment name.

AI care coordinators medication adherence bots post-discharge follow-up patient triage agents

Medical Education & Training

E-learning platforms, anatomy courses, and procedure walkthroughs rely on TTS to narrate complex medical vocabulary. Students need to hear correct pronunciations, not phonetic guesses.

CME e-learning anatomy narration surgical training videos nursing certification prep

Financial Services

Fund names, ticker symbols, economic indicators, and executive names appear in every earnings summary and market briefing. Consistent pronunciation signals professionalism and builds listener trust.

earnings call summaries market briefings fund prospectuses investor updates

Broadcasting & Media Production

News outlets, podcasters, and video platforms auto-generating narration face a constant stream of brand names, foreign place names, and public figures that generic TTS engines consistently mispronounce.

news briefing narration podcast summaries video voiceover sports commentary

Legal & Compliance

Legal documents, regulatory filings, and compliance training are dense with Latin phrases, case citations, and jurisdiction-specific terminology that generic TTS engines consistently get wrong.

contract narration compliance training regulatory filings deposition summaries

The ultimate pronunciation stress test

Pharmaceutical drug names are among the hardest vocabulary in any industry: complex, unfamiliar, and high-stakes. If Resemble handles these, it handles yours.

Compare Resemble's synthesized pronunciation against the reference audio. Each drug has 6 pronunciation variants; expand a card to hear them all.

Calquence
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Cyramza
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Imfinzi
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Lynparza
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Mounjaro
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Olumiant
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Soliris
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Tagrisso
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Taltz
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Ultomiris
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Verzenio
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
abemaciclib
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
acalabrutinib
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
baricitinib
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
durvalumab
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
eculizumab
5 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
empagliflozin
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
ixekizumab
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
osimertinib
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
ramucirumab
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
ravulizumab
6 variants
Resemble AI
Reference
Variant 00
Reference
Variant 01
Reference
Variant 02
Reference
Variant 03
Reference
Variant 04
Reference
Variant 05
Reference
Get started with Resemble AI