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You are here: Home / Developing eLearning / Text To Speech Synthesizers For eLearning

Text To Speech Synthesizers For eLearning

by Connie Malamed

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sound-wavesDo you like Paul and Kate or are you fond of Mike and Crystal? Personally, I think Charles and Audrey from the UK are brilliant. This is how I started to think about synthesized voice characters after listening to them lately.

When TTS Is Useful

We can probably all agree that computer-generated voices do not have the warmth and richness of a human voice, nor can they display the range of talents found in a skilled narrator. But there are times when this option is worth exploring.

One reason to use text-to-speech (TTS) software is to provide accessibility to visually impaired persons or those who have difficulties with reading. Not all online courses are narrated and often instructions are left as text only. TTS is a way to overcome these obstacles.

TTS can also be effective as the voice of an avatar or guide. It also seems appropriate when there isn’t time or budget for recording and syncing visuals and audio, particularly for dummy or scratch audio when you need to show others how the media elements will be integrated. Finally, in an imaginative piece, TTS could be appropriate as the sound of a machine, object or computer.

Text-to-speech capabilities are integrated into Adobe Captivate, providing a way to use this feature without requiring additional software. But if your authoring tool of choice does not have this functionality, you will need to rely on external software and import the audio files. Below is a list of text-to-speech software you can explore. Listen carefully to the voices as some have demos that read back text you’ve entered. Also, many now have speakers in multiple languages.

TEXT TO SPEECH SYNTHESIZERS

iSpeech

iSpeech has a variety of online services and pricing models for converting TTS and downloading the files from their site. If you are developing a website, such as a learning portals, you can also connect through their API using a few lines of code and you’ve got a spoken version of your text.

NaturalSoft

NaturalSoft makes the NaturalReader software that comes in several versions, including a free one. The Professional version is most relevant to online learning as it converts files to wav/.mp3 formats and comes with two or four voices.

NeoSpeech

NeoSpeech is primarily an on-demand service, though they do license their software engine to developers. You buy credits, select a voice, enter or copy/paste text into their editor, and download the synthesized audio files.

Read The Words

This is an online TTS application that provides conversion of text files and documents to audio files using a variety of voice characters. There’s a free version and a paid upgrade.

Speech-Over Professional

This TTS software works with PowerPoint. It generates narration from PowerPoint text.

SpokenText

SpokenText is an online speech to text synthesizer that converts text files, documents (pdf, doc, ppt) and web pages to audio files. There are a variety of pricing structures and several voices to choose from.

TextAloud

NextUp sells the synthesizer TextAloud 2 for the PC and Ghostreader for the Mac. It also sells diverse character voices in different languages from the major voice publishers, including AT&T Natural Voices, Acapela Group, RealSpeak and Cepstral.

Virtual Speaker

Virtual Speaker is another text to speech converter. It has a lot of options for making recordings, but potential buyers need to contact the publisher, Acapela Group, for pricing.

VoiceForge

This is an online TTS service using Cepstral’s voices. You get access to all the character voices for one price, but this service is for online applications and devices only.

LinguaTec

Linguatec publishes VoiceReader software, which can convert any text to audio. VoiceReader text-to-speech works in many different languages.

Wizzard

Just in case you’re a developer or in case your business is looking for a TTS technology, check out the Wizzard site. They produce speech applications for developers and businesses and they use AT&T’s Natural Voices.

VOICE PUBLISHERS

Acapela Group

Acapela provides diverse audio services and one of these is the creation of character voices in many different languages. Check out the variety of their voices at their site.

Cepstral

Cepstral is a synthetic voice publisher. You can meet Allison, Lawrence, Vittoria and many more character voices from different countries at their Demos page. Voices work with both PC and Mac.

How do you use text to speech in online learning? Tell us your experiences and recommendations.


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Comments

  1. Mitchell Anderson says

    March 19, 2021 at 11:11 am

    Connie, others you should definitely check out Murf – http://murf.ai if not already. I have been using their text to speech voices for 3 months now and my clients are very much satisfied.
    Earlier I was using my voice for the narration but shifted to murf because my clients prefer a more professional voiceover, but it takes to too much time to record a real person and pay is also high for a voice talent, this is where why murf ai voices was a good discovery for me.

  2. Jennish says

    December 4, 2020 at 10:14 am

    I recommend the speech to text software MyVoice2Text.com (http://www.myvoice2text.com), I’ve been personally using this app since 2 years for all my transcription requirements and it works wonders. Try it!

  3. Ben says

    November 28, 2019 at 9:15 am

    One of the best text to speech app for learning is “Text Speaker”. This app is useful for listening to audio version of documents. I can easily create audio files to carry on my phone. This is an excellent app with pleasant human sounding voices.https://www.deskshare.com/text-to-speech-software.aspx

  4. Romeo Zegna says

    December 18, 2017 at 7:35 pm

    Out of these, Neospeech voices sound the most natural to me. Their ‘Julie’ and ‘Paul’ voice are very high quality voices that you could possibly mistaken them for human voices.

  5. Os Guy says

    September 7, 2017 at 5:37 am

    One of the Best Text to Speech (TTS) tools to Convert Text to Audio which I know are
    1. Espeak
    2. Natural Reader
    3. Read4Me TTS Clipboard Reader
    4. Ivona
    5. Ultra Hal TTS Reader

  6. Sam says

    April 12, 2015 at 1:09 pm

    The web speech api is a nice resource too

  7. Connie Malamed says

    July 30, 2012 at 1:47 pm

    Thanks for your comment, Mike. I don’t like them much either, unless you’re in a desperate situation or simulating a robot or sci-fi character.

  8. Michael says

    July 30, 2012 at 1:44 pm

    Hello!

    I have found that no matter what text-to-speech program I use, there are far too many oddities in pronunciation to efficiently and cost effectively use one for narration. Besides, finding a professional narrator is easy, and depending on who you choose, it can be inexpensive as well.

    Check out The Narrator Files. They price narration by the page, which will save you A LOT of money, and they have exemplary voice talent and a fast turnaround time as well.

    Best!

    Mike

  9. Mike says

    July 24, 2010 at 12:55 am

    I recommend the text to speech software Panopreter (http://www.panopreter.com), it reads txt files, rtf files, word documents, pdf files and web pages, and converts the text to mp3 and wav files.

  10. Joel Harband says

    April 29, 2010 at 5:33 am

    In response to your question: How do you use text to speech in online learning? Tell us your experiences and recommendations.

    I’d like to mention our product Speech-Over, which is used in corporations and academic institutions to produce PowerPoint-based audio online learning generated from text to speech. Although I’m not allowed to recommend it myself, you can see user success stories on our site http://www.speechover.com.

    Joel

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