robot hand holding holographic microphone

Should You Use AI or Human Voice-Over?

Voice-overs are vital to transforming static content into a dynamic, engaging, and memorable experience across diverse communication platforms. They provide a human touch to digital content, transforming it into a relatable experience for learners and viewers, and voice-overs are also critical to making the content accessible to people with visual impairments. 

  • In eLearning courses, a well-articulated voice can enhance comprehension, clearly deliver complex concepts, and keep learners focused. 
  • In corporate videos, a professional voice reinforces the brand's identity and messaging. Human resources initiatives benefit from voice-overs by conveying policies, training, and company culture in a personable manner. 
  • For promotional videos, a compelling voice can captivate the audience and establish a connection with the viewers, making your message more memorable. 

In the evolving landscape of content creation, the debate over using AI-generated voice-overs instead of human voice actors has become nuanced. With the improved capabilities of AI to mimic human speech patterns, we reached a crossroads in deciding which avenue best serves our project goals. 


The state of AI voice-overs 

The more advanced AI voice-over engines teeter on the edge of mimicry, often resembling a peculiar and unbalanced imitation of human speech rather than a robotic articulation. While significant strides have been made in replicating human timbre, challenges persist in achieving consistent sound quality and pitch accuracy and addressing the intricate nuances of tone, cadence, and emphasis. AI companies are improving their synthetic voices with different tones suitable for a wide variety of content; however, there is still a long road to achieving the fluid and varied expressions inherent in human speech.  


Is AI cheaper? 

One might consider using AI voice-overs to save time and cut costs, as people assume that using AI voices leads to reduced costs. However, the reality proves more complex. The involvement of intermediary companies to have access to good AI voices and editing software, coupled with the need for human quality assurance, often leads to significant expenditures in time and money. AI voices often require a long post-editing process to reach a quality ready for final use. This work potentially involves people in different fields: sound engineers, linguists, and DTP (desktop publishing) professionals to ensure a quality AI voice-over. 


The role of human supervision 

Despite the AI's ability to replicate speech fairly accurately, errors persist. Mispronunciations often arise when the script includes acronyms, brand names, proper names, or words in a foreign language. The meticulous work of audio engineers and linguists is often needed to fix pronunciation errors, unnatural pauses, or reading speed. You might end up recording small chunks of text just to get more control over the outcome, thus spending more time preparing the audio files. 


Synchronization challenges 

One notable drawback of AI-generated voice-overs lies in the intricate task of synchronizing audio with visual content. While AI may excel in voicing slides and courses without time constraints, it struggles when animations and on-screen speakers demand precise timing.  

It is annoying and focus-breaking for viewers to have an audio track not synchronized to the video. Videos with time restraints require a considerable time investment to ensure a semblance of coherence between video and audio content. The post-editing needed to synchronize AI voice-overs can extend the production timeline significantly, which stands in stark contrast to the efficiency of human voice actors who, with adaptability, can deliver exact and well-synched content within a shorter time. 


The subject of your content matters 

The core message delivered by AI-generated speech may be understood, but sometimes, how the message is delivered is just as important. The distinctive cadence, variation, and natural pauses and breaths inherent in human speech contribute to a level of authenticity that AI struggles to replicate. As a result, even refined AI voices cannot get the same emotional connection with people that professional voice actors can. Furthermore, you can easily direct a voice actor to interpret various parts of the text however you want them for your desired effect. If you need a voice-over for content related to sensitive matters, like medical conditions or news about accidents, a human voice is the best to have the right delicate tone and deliver the message. The same text read by an AI voice can appear impersonal and convey a lack of interest or care to the listener. 


Striking a balance depending on your project needs 

As AI technology improves, we must recognize its downsides and decide when it can be a suitable solution or compromise. While AI holds promise in specific applications, the quality, adaptability, and authenticity that human voice actors bring to the table remain irreplaceable. 

Let us consider a few usage examples.  

Content Suitable for AI Voice-over 

Content Better Suited for Human Voice-over 

Slides and Courses: Narration of educational slides and other instructional content with minimal synchronization demands. 

Simple Informational Videos: Straightforward informational videos without nuanced expression, precise timing, or complex emotional delivery. 

Narration for Static Visuals: When the content primarily involves narrating over static visuals without timing requirements. 

Automated Messaging Systems: AI-generated voices can be suitable for automated messaging systems, phone prompts, and other instances where a neutral and clear voice is sufficient. 

Long eLearning courses with Interactive Elements: training modules that involve interactive elements, tests, simulations, or role-plays are better suited to human voices that can keep listeners' attention and adapt to the type of content.  

Animations with Precise Timing: Projects involving animations with specific timing requirements, where the voice must synchronize seamlessly with on-screen actions. 

On-Screen Speakers: Videos featuring on-screen presenters, hosts, or actors need the natural cadence, emotion, and synchronization capabilities of human voice actors. 

Commercials and Promotional Content: Since voice delivery significantly affects audience beliefs and feelings, human voice actors are preferred. 

Narration for Storytelling: Projects needing storytelling, emotional depth, and acting. 

Content Requiring Pronunciation Accuracy: Projects with specific terminology, industry jargon, or linguistic nuances. 

Branding and Corporate Communication: Any corporate or business content where the human touch is crucial for building trust and connection. 



Final thoughts 

While AI voice-overs offer cost-effective solutions in specific situations, human voice actors excel in delivering high-quality, emotional, and synchronized narration, making them indispensable for all content that needs a nuanced and authentic human touch. Selecting the right voice is not merely a technical or budgetary choice but a decision that resonates with the audience and affects the success of your project. 


Related Blog Articles

healthcare workers speaking
How Much Does Translation Really Cost?
Read article ›
man operating video camera
Video Can Make or Break Your eLearning Course
Read article ›
Why Narration Is a Must for eLearning Courses
Read article ›
Audiovisual Translation: Voiceover vs. Subtitling
Read article ›