
Voice Domain Expert at Meta | Bilingual Voice Artist (EN/PT) | AI Speech, Localization & Voice Direction | E-learning, Apps, Games & Commercials
I’m a bilingual Voice Over Artist and Voice Domain Expert working across Brazilian Portuguese and American English, with 10+ years of experience in voice, communication, and audio production.
For more than 9 years, I was the Brazilian Portuguese voice of a large-scale AI voice assistant (TTS), working at the intersection of voice performance and speech technology. Today, I also work as a Voice Domain Expert at Meta, contributing to AI development through annotation guidelines, quality assurance, data annotation, and expert evaluation of speech and voice outputs.
My work sits at the intersection of human voice, technology, and AI, combining extensive experience in commercials, e-learning, narration, apps, video games, audiobooks, meditation, and AI voice systems. My voice work includes projects for brands such as L’Oréal, Natura, Vichy, and Deel, as well as meditation and sleep content for platforms including Calm and Sleepiest. Across these projects, I bring a particular focus on vocal consistency, natural delivery, linguistic nuance, and expressive precision.
My areas of expertise:
• Voice Domain Expertise – speech evaluation, annotation guidelines, QA & data annotation
• AI / TTS Voice & Speech Data
• Voice & Speech Evaluation – emotion, intention, naturalness & audio quality
• Audio Localization & Script Adaptation
• Voice Direction & Quality Control
My background in acting, voice, movement, and body awareness gives me a highly developed sensitivity to breath, intention, emotion, rhythm, vocal detail, and subtle differences in human expression — skills that are increasingly valuable in the development and evaluation of voice AI.
I work from a professional broadcast-quality home studio and am accustomed to collaborating with international production, localization, creative, and technology teams.
Cintya Chaves in the press:
The World of Voice Acting – Film Daily
Voz, Performance e Novas Soronidade
Home Studio
(Equipment & Recording Setup)
I record professional voiceovers from my home studio, delivering broadcast-quality audio for clients anywhere in the world.
Equipment I use:
- DAW: Pro Tools or iZotope RX 8
- Microphones: Sennheiser 416 and Aston Origin
- Interface: Focusrite Scarlett
- Source-Connect
Most projects can be recorded and delivered within 24 hours, and in many cases, same-day turnaround is possible. I send audio in the format you prefer (WAV, AIFF, MP3, etc.) through email, Dropbox, WeTransfer, or Google Drive. Source-Connect is also available for live sessions.
My background in theater, improv, and on-camera work taught me how to create believable characters, adapt quickly, and follow direction with ease—skills that make every recording session smoother.
Voice style: Warm, engaging, balanced resonance, with a smooth and velvety tone.
I’m based in the United States and record in both English (American) and Brazilian Portuguese, either from my professional home studio or in studios in the Bay Area. I’m also available to travel, and can fly to Los Angeles anytime for dubbing or voiceover projects.



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