Why Sound Designers Like Minjia Du Are In Demand, Despite Hollywood's AI Takeover

As AI tools rapidly flood the film industry, a fundamental question hangs over post-production suites: Why is the human intuition of a skilled sound designer more critical than ever for emotional storytelling?

For Los Angeles-based sound engineer Minjia Du, whose work spans narrative film, high-profile commercial campaigns, and vertical dramas, the answer lies in the distinction between technical perfection and narrative truth. Having worked on esteemed films like The Last Coin and The Stolen Mind, Du knows what it’s like being an experienced sound engineer who can use AI without entirely relying on it.

“I don’t view AI as the enemy of sound designers,” Du says. “In many ways, it has already become a useful extension of our workflow.” 

She points to recent tools such as iZotope RX 12’s neural Dialogue Isolate, which can separate speech from complex backgrounds, and Accentize’s dxSplit and dxRevive Pro, which can isolate voice, reverberation and noise or reconstruct damaged portions of a recording. In Pro Tools, AI-powered Speech-to-Text allows her to locate and edit dialogue directly from a transcript. For generative work, newer systems such as Adobe Firefly can use a recorded vocal cue to guide the timing, intensity and movement of newly generated sound effects.

“These tools can save us from hours of repetitive work,” she adds.

However, machine learning reaches a hard limit when it comes to the subtle nuances of human performance.

“Emotional storytelling begins where automatic processing ends,” she explains. “An algorithm may recognize that a breath, a vocal crack or an uneven pause is technically imperfect. A sound designer has to understand whether that ‘imperfection’ is actually the most truthful part of the performance.” 

She explains how sometimes cleaning a track too aggressively makes an actor sound less human. Meanwhile, the right decision is not to add a dramatic impact, but to remove the music and allow an uncomfortable silence to remain as part of the sound design.

“AI is very good at producing something plausible but human intuition determines whether it is meaningful,” notes Du. “We listen for subtext: whether a character’s confidence is hiding fear, whether a romantic moment should feel safe or dangerous, or whether a polished sound would contradict the emotional reality of the scene. Those decisions depend on empathy, cultural understanding and conversations with the director—not simply pattern recognition.”

The Value of End-to-End Expertise

In an era where post-production is increasingly fragmented, Du stands out for overseeing the complete audio workflow; from location recording and wireless systems on set to intricate sound design and final re-recording mixing. Having earned her degree from Hong Kong Baptist University before continuing her filmmaking studies at the New York Film Academy, her holistic perspective makes her an indispensable asset on modern productions.

Du’s recent credits reflect this versatile, end-to-end approach. She served as the sound mixer for the AFI independent film Fortune House and as supervising sound editor for The Last Coin; both of which earned Official Selections at LA Shorts 2026.

“What makes an experienced sound engineer difficult to replace is not simply the ability to operate equipment,” Du notes. “It is the continuity of judgment that one person can bring from the set all the way through the final mix.”

Working on set directly informs how she handles the edit. “On location, I am already thinking about post-production. If an actor is whispering, I am considering microphone placement, clothing noise, the acoustics of the room and how much isolation the dialogue editor will eventually need. I am monitoring wireless frequencies, gain structure and timecode, but I am also watching the actor’s movement and making sure the equipment does not interfere with the performance. I know when we need room tone, a wild line or an isolated practical sound before the set is struck.”

“That post-production knowledge changes what I preserve,” she continues. “I avoid unnecessary destructive processing, keep clean isolated tracks and record enough spatial information to rebuild the scene naturally later. When I reach the editorial stage, I understand why a track sounds the way it does and what was happening around the performer. That can eliminate a great deal of guesswork.”

Navigating High-Volume, Rapid Turnarounds

Du’s agility as a sound engineer is perhaps nowhere more evident than in the booming world of vertical short dramas, which has taken the US market by storm over the past few years. Having served as sound designer on smash-hit series for high-traffic platforms like DramaBox and DramaWave, including No Escape From The Mafia King's Embrace, which garnered over 211 million views, she knows firsthand how human creative problem-solving overcomes complex audio challenges on crushing deadlines.

“On some vertical productions I have worked on, approximately 60 episodes of sound design may need to be completed in about two weeks,” Du notes. “An episode can be only 60 to 90 seconds long, yet it may contain three to six music changes, numerous sound effects and several major emotional turns. The first eight to ten episodes are particularly demanding because they must establish the premise, introduce the characters and deliver enough hooks and cliffhangers to persuade viewers to continue.”

To survive that pace, high-tech tools and human strategy must integrate seamlessly to adapt to this high-paced work flow for DramaWave and DramaBox, which have millions of views on their apps and subscriber-based platforms per day.

“At that volume, efficiency has to be designed into the workflow,” she says. “In practice, we usually work directly inside the editing software, but we rely heavily on a range of AI-assisted audio tools to speed things up.” 

She notes that modern AI noise reduction, dialogue separation, and restoration plugins can quickly clean production sound, and help a production team identify usable takes. “Tools like iZotope RX’s AI modules, Adobe Enhance Speech, or other dialogue isolation and repair plugins are extremely useful for quickly diagnosing problems and preparing material for fine editing,” she said. “On top of that, AI-based transcription and auto-labeling systems help us locate lines instantly, organize versions, and manage large amounts of dialogue without manually scrubbing through every timeline.”

The workflow also touches on voice technology. “We also increasingly use voice cloning and AI voice platforms to repair or adjust dialogue when needed, but only when the performer and rights holders have explicitly approved that workflow. This can significantly reduce ADR workload—sometimes we can fix a missing word, adjust a line reading, or even replace a damaged take without bringing actors back into the studio. It’s especially useful in short drama workflows where schedules are extremely compressed.”

Yet, human talent remains irreplaceable when dramatic stakes rise. “Current AI voice technology still has clear limitations. In emotionally complex scenes—such as breakdowns, subtle conflict, or layered performances—the emotional nuance is often not yet at a level that meets a director’s expectations,” said Du. “In those cases, we still rely on real actors to re-record and deliver the performance properly.” 

She believes AI will continue to improve rapidly, and it is very likely that it will eventually take over a large portion of the traditional ADR process, at least within the short-form drama space. But Du still favors actor-recorded ADR because performance continuity involves much more than matching words and pitch. “A performer’s voice is part of their identity, not simply another editable asset,” she says.

To structure the sonic chaos, Du creates tailored audio taxonomies. “I first identify the ‘hero’ dialogue, emotional peaks and cliffhanger moments; I then build a sonic vocabulary for the series—character motifs, transition families, impact levels and music categories,” she said. 

“Because original scoring is often impossible within these schedules, finding and editing the right library music becomes a major creative task. Sound designers tend to develop enormous libraries with strangely specific categories such as ‘dangerous but seductive,’ ‘romantic with suspicion’ or ‘victory with consequences.’ Those categories may sound amusing, but they save valuable time because they describe narrative function rather than genre alone.”

Designing for Global Audiences

Beyond narrative film and episodic series, Du’s portfolio extends to high-end commercial campaigns for major global brands, including Hennessy and EcoFlow. Crafting audio that resonates universally across international markets requires balancing physical realism with cultural awareness.

“I begin with the understanding that ‘universal’ does not mean culturally neutral,” Du explains. “People across different markets may respond to certain physical qualities—proximity, breath, rhythm, material texture, dynamic contrast and silence—but the cultural meaning attached to music, voices and even particular sound effects can vary enormously.”

Her approach adapts to the ethos of each client. “For Hennessy, where my role centered on production sound, the priority was capturing a polished but tactile reality: clean performance, intentional product interaction and the physical details that give an image credibility. Glass, liquid, movement and human presence must feel refined without becoming artificial. On EcoFlow projects, where I have worked in sound design, the audio language is different. The products need to communicate precision, reliability, mobility and energy. I want the technology to feel responsive and powerful without making it sound aggressive or mechanically exaggerated.”

Crucially, she resists lazy tropes. “In both cases, I avoid using cultural shorthand simply because a campaign is intended for a particular region. Adding one stereotypical instrument does not create authentic localization. I would rather understand the emotional promise of the brand, collaborate with people who know the market and create a sound system that leaves room for different languages and interpretations.”

She adds, “There is also a technical side to global communication. I prepare organized dialogue, music, effects and ambience stems so that voice-over and localization teams can adapt the work without destroying the original mix. I check how the sound translates through phones, earbuds, laptops and larger speakers because audiences in different markets may encounter the same campaign in completely different environments.”

The Hybrid Future of Sound Engineering

Looking ahead, Du sees the sound engineering profession evolving into a hybrid model where technical automation elevates, rather than eliminates, human creativity.

“I think sound engineering is moving toward a hybrid profession,” she says. “Restoration, transcription, asset search, session organization and versioning will become increasingly assisted by AI. Generative technology will make it faster to listen to unusual textures, while spatial, binaural and object-based audio will create more ways to design for theaters, headphones, mobile devices and immersive platforms.”

Far from rendering the sound engineer obsolete, tech advancements raise the stakes for creative decision-making.

“That does not make the sound engineer less relevant. It moves our responsibility toward higher-level creative judgment. Someone still has to decide which generated material belongs in the world of the film, whether it supports the performance, how it should be edited and layered, and when it should be rejected. As synthetic material becomes easier to create, provenance, consent and creative accountability will also become a larger part of our profession.”

Ultimately, the future belongs to artists who can bridge technological innovation with deeply human storytelling.

“I expect the most valuable sound professionals to combine technical fluency with storytelling instincts. They will know how to direct new tools, but they will also know when a scene needs less processing, fewer effects or complete silence. More content and more delivery formats do not automatically create more coherence. Human supervision is what turns an abundance of material into a unified emotional experience.”

As an international woman navigating the upper echelons of sound craft, Du remains dedicated to bringing a grounded, empathetic perspective to media. “The perspective I hope to continue bringing is shaped by working across production and post-production, as well as by building my career as an international woman in the industry. I am interested in the relationship between technical precision and emotional vulnerability. I want to preserve the texture of an actor’s performance while creating sound worlds that can be cinematic, imaginative and culturally aware.”