The Differences Between Natural and Synthetic Text-to-Speech Voices

The Differences Between Natural and Synthetic Text-to-Speech Voices

Online Text-to-speech has become an emerging technology in recent years. They simply take the words from any digital device and convert them into authentic audio formats. People are using the A voices of the TTS tools in their educational projects, professional voiceovers, or YouTube Channels. However, there’s still a difference between the natural voice of humans and synthetic TTS voices. Today we will discuss the differences between natural and synthetic text-to-speech voices.

What is Synthetic Text-To-Speech? 

Synthetic speech is the computer-generated AI-powered voice that resembles a human’s natural voice. These synthetic AI voices are world-widely used in screen reading Text-to-audio tools, virtual assistants, and GPS apps. Even those who have trouble speaking have benefited from its help with communication. People with visual impairments are also benefiting from these Synthetic text-to-speech voices to access written information.

Natural Vs Synthetic TTS Voices

Here are some key differences between natural and Synthetic text-to-speech voices.

Generation Source

Natural voices are produced through human vocals, while synthetic voices are generated through AI-fueled algorithms and machine-learning techniques.


Human voices are relatively flexible in comparison to AI voices. For example, all-natural voices vary in pitch, intonation, speed, and volume. Online technology has improved in recent years, but it still may lack the degree of expression compared to natural voices.


Humans can show emotional expression through their speech. They can show different feelings with their voice, like happiness, sorrow, anger, etc. Although AI voices have evolved, they still can’t compete with natural speech regarding emotional expression.


Natural voices are more prone to imperfections like stutters, hesitations, or breath sounds that can affect the quality of a voiceover. It takes more effort to make a voiceover more perfect. But that’s not the case with text-to-voice generators. They can generate perfect voiceovers in one go.


Humans can switch effortlessly between different dialects, accents, and languages, as they have a wider range of adaptability in comparison to the TTS tools. AI voices can’t be as adaptable as human speakers.


Humans can convey complex messages by making them light and easy to understand by using jokes and metaphors according to the situation and context. In contrast, TTS’s synthetic voices lack this feature. They can only speak what they are fed in the form of text.    


Every human has a unique voice with a natural pitch and speaking style. While AI voices can only mimic a particular vocal characteristic, they still lack the level of individuality of a natural voice.

The Future of AI Text-To-Speech Voices

Despite all the differences between natural and synthetic TTS voices, this technology is constantly growing. It will not be wrong to predict that in the future, text-to-voice technology will become quite similar to natural voices. You will be able to enjoy more realistic synthetic speech. The Ai voice generators will be able to generate an authentic, natural-sounding voice with just a few minutes of recorded speech.   


With the advancement in text-to-audio technology, AI voices are becoming more human-like. Those days are gone when AI synthetic voice seemed to be robotic. We have thoroughly discussed the differences between natural and synthetic text-to-speech voices. Keeping in view the advancement of Ai voice generators, it won’t be wrong to say that AI voices will become more realistic and natural-sounding in the future.