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More about Large Language Models, supported languages, and usage limits

New to NaturalReader's personal apps are the LLM Multi-Lingual Voices. Powered by ChatGPT, these are the most advanced TTS voices in the market today.

Word-by-word highlighting is not supported in the desktop web app version.

What is LLM?

LLM means "large language models," an advancement in AI deep learning algorithms used to create TTS voices. LLM voices are trained using very large amounts of data. The result is voices that understand text on a much deeper level than ever before. ​ This means that unlike previous AI voices that understand text sentence by sentence, LLM voices can understand the entire overall context of your text input. This advancement in language processing gives you the most natural intonations with human-like voices ever made.

What languages are supported by LLM Voices?

LLM Voices are multi-lingual, meaning that the same voice can speak in multiple languages. LLM Voices also include any Cloned Voices, meaning that your Cloned Voices can read from multiple languages as well. Learn more about language support for all of NaturalReader's personal voices here and bout voice closing here.

Supported LLM languages are: ​

English (US), Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Marathi, Maori, Nepali, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Thai, Turkish, Ukrainian, Urdu, Vietnamese, and Welsh.

LLM Usage Limits

LLM Voices are considered Plus Voices and included with a Plus subscription. Learn more about TTS (text to speech) limits here .

Plus plans come with 500,000 characters of TTS in-app/Chrome extension listening per day using Plus Voices and unlimited listening with Premium Voices.

It also includes 1 million total characters to convert with per month to downloadable mp3 files.

Each character used with a LLM Voice will count as 2 characters towards your daily TTS and monthly mp3 conversion limits.* ​

Keep track of your daily TTS Usage by going to Account > Daily TTS Usage. View your mp3 character count by selecting MP3 from the app menu.

*spaces and punctuation are included in the character count

• Personal Plus
• Online Reader

Plus Voices

High-fidelity, accurate, lifelike voices.

Using the latest technology for the most natural experience

Pre-Recorded Voice Demo

Far out in the ocean, where the water is as blue as the prettiest cornflower, and as clear as crystal, it is very, very deep; so deep, indeed, that no cable could fathom it: many church steeples, piled one upon another, would not reach from the ground beneath to the surface of the water above. There dwell the Sea King and his subjects. We must not imagine that there is nothing at the bottom of the sea but bare yellow sand. No, indeed; the most singular flowers and plants grow there; the leaves and stems of which are so pliant, that the slightest agitation of the water causes them to stir as if they had life. Fishes, both large and small, glide between the branches, as birds fly among the trees here upon land. In the deepest spot of all, stands the castle of the Sea King. Its walls are built of coral, and the long gothic windows are of the clearest amber. The roof is formed of shells, that open and close as the water flows over them. Their appearance is very beautiful, for in each lies a glittering pearl, which would be fit for the diadem of a queen.

The Little Mermaid by Hans Christian Andersen

Tell me, O Muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, oh daughter of Jove, from whatsoever source you may know them.

So now all who escaped death in battle or by shipwreck had got safely home except Ulysses, and he, though he was longing to return to his wife and country, was detained by the goddess Calypso, who had got him into a large cave and wanted to marry him. But as years went by, there came a time when the gods settled that he should go back to Ithaca; even then, however, when he was among his own people, his troubles were not yet over; nevertheless all the gods had now begun to pity him except Neptune, who still persecuted him without ceasing and would not let him get home

The Odyssey - Homer

Academic (textbook) 01

The range of objects and phenomena studied in physics is immense. From the incredibly short lifetime of a nucleus to the age of the Earth, from the tiny sizes of sub-nuclear particles to the vast distance to the edges of the known universe, from the force exerted by a jumping flea to the force between Earth and the Sun, there are enough factors of 10 to challenge the imagination of even the most experienced scientist. Giving numerical values for physical quantities and equations for physical principles allows us to understand nature much more deeply than does qualitative description alone. To comprehend these vast ranges, we must also have accepted units in which to express them. And we shall find that (even in the potentially mundane discussion of meters, kilograms, and seconds) a profound simplicity of nature appears—all physical quantities can be expressed as combinations of only four fundamental physical quantities: length, mass, time, and electric current.

College Physics - Physical Quantities and Units

Academic (textbook) 02

By the end of this section, you will be able to:

- Compare and contrast anatomy and physiology, including their specializations and methods of study

- Discuss the fundamental relationship between anatomy and physiology

Human anatomy is the scientific study of the body’s structures. Some of these structures are very small and can only be observed and analyzed with the assistance of a microscope. Other larger structures can readily be seen, manipulated, measured, and weighed. The word “anatomy” comes from a Greek root that means “to cut apart.” Human anatomy was first studied by observing the exterior of the body and observing the wounds of soldiers and other injuries. Later, physicians were allowed to dissect bodies of the dead to augment their knowledge. When a body is dissected, its structures are cut apart in order to observe their physical attributes and their relationships to one another. Dissection is still used in medical schools, anatomy courses, and in pathology labs. In order to observe structures in living people, however, a number of imaging techniques have been developed. These techniques allow clinicians to visualize structures inside the living body such as a cancerous tumor or a fractured bone.

Anatomy and Physiology

Through the combined power of NASA’s James Webb Space Telescope and gravity creating "natural telescopes" in space, astronomers hope to answer two science questions that are fundamental to understanding the origins and evolution of the universe:

- How did the first galaxies in the universe form, and did they make the universe transparent to light?

- How did later galaxies produce and disperse into the universe the heavier elements that are the building blocks of stars, planets, and even humans?

These questions will be addressed in some of the first observations made by the Webb telescope, slated to launch in March 2021. These observations will be part of the Director's Discretionary-Early Release Science program, which provides time to selected projects early in the telescope's mission. This program allows the astronomical community to quickly learn how best to use Webb's capabilities, while also yielding robust science.

An international team led by Tommaso Treu of the University of California, Los Angeles, has been investigating how Webb can tackle these two key questions about the universe in the Early Release Science program.

NASA’s Webb to Explore Galaxies from Cosmic Dawn to Present Day - Ann Jenkins

Web-based learning tools can help deepen science knowledge among all middle school students, and ease the science literacy gap for underachieving students, according to a three-year study published today in the International Journal of Science Education.

While all participating students improved their science knowledge, the results were particularly notable for less able students.

Students with learning disabilities improved 18 percentage points on assessments of science knowledge from pre-test to post-test, and English language learners increased 15 percentage points. Pupils taught the same content with traditional methods, such as textbooks, showed only 5-point gains.

"Well-designed instructional technology really works to lessen the science literacy gap among diverse groups of learners. Technology offers an engaging and motivating environment for learning, and we are just beginning to understand how we can use it effectively to support students with learning disabilities and English language learners.

Web-based teaching can improve science understanding for struggling pupils - Taylor & Francis Group

*There's more languages and voices available! You can try all Plus Voices directly from NR Online for up to 5 minutes per day.