Hequn Li

Native Mandarin speaker and professional audio engineer with 10+ years of experience in studio dialogue recording, audio localization, live sound, professional audio QA, and AI voice-data projects.

At Keywords

Studios, I worked directly with voice directors and professional voice actors to record, edit, restore, mix, quality-check, and deliver high-quality voice-over assets using Pro Tools and iZotope RX. At micro1, I record Mandarin and English speech in both clean and scenario-specific noisy conditions, evaluate AI-generated speech, and serve as a mandarin recording-project reviewer.

Freelance AI Voice & Data Evaluation Contractor - micro1 Inc. - Remote, Tokyo, Japan

(2026-05)

• Record and submit original Mandarin and English speech data according to detailed scripts, acoustic requirements, and project-specific quality standards.
• Produce both clean, background-noise-free speech and recordings with varied, realistic, scenario-appropriate environmental sounds, while preserving clear pronunciation and accurate delivery of intended meaning.
• Evaluate AI-generated Mandarin and English speech and dialogue for naturalness, pronunciation, clarity, semantic accuracy, consistency, audio quality, and technical artifacts.
• Selected as a recording-project reviewer after consistently meeting quality standards; review contributor recordings, identify linguistic and technical issues, and provide actionable feedback to improve project output.

Voice-Over Recording & Audio Localization Engineer - Keywords International Co., Ltd. (Keywords Studios) - Tokyo, Japan

(2022-02 - 2024-06)

• Collaborated closely with voice directors and professional voice actors during studio sessions to capture high-quality Japanese voice-over performances for AAA game localization, monitoring microphone technique, take quality, script accuracy, tone, timing, and consistency.
• Edited and assembled dialogue extensively in Pro Tools; used iZotope RX for noise reduction, de-clicking, de-breathing, de-reverb, and restoration, then performed level balancing and dialogue mixing to create clean, consistent, production-ready audio.
• Completed technical and linguistic QA, file naming and format checks, session documentation, and large-volume asset organization; incorporated director, producer, and client feedback through final delivery.

Live Sound Engineer & Technical Operations - SCHOOL LIVE & BAR TOKYO - Tokyo, Japan

(2024-06 - 2026-06)

• Operated professional audio systems and resolved noise, feedback, gain-structure, routing, and monitoring issues in demanding live environments.

Professional Audio Product Tester - Yamaha Corporation - Hamamatsu, Japan

(2015-10 - 2017-11)

• Performed systematic listening and functional QA for professional audio hardware and software, reproducing issues and reporting findings to R&D teams.

Specialist Diploma (Senmonshi) - Recording & PA - ESP Entertainment Tokyo

B.S. - Aircraft Engine Engineering - Beihang University (BUAA)