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ExtraVoices
NVDA uses the Windows OneCore Voices by default. These are natural sounding voices which are included with Windows 10. Install other Windows OneCore Voices from within Windows settings. On the "Speech settings" page, activate the "Add Voices" button, and select a language to install. A list of voices is available from: Microsoft's supported languages and Voices page.
NVDA also comes packaged with a speech synthesizer called eSpeak-NG. It is very responsive and has the ability to speak in over 120 languages and dialects. eSpeak-NG is understandable at fast rates, and is very tiny. As it comes bundled with NVDA, it will be available on any system you choose to run NVDA.
To select the synthesizer to use, press NVDA+control+s to open NVDA's synthesizer dialog. Depending on how NVDA is setup, the NVDA key will be either insert or caps lock. The first option on the synthesizer dialog, is a combo box to set the synthesizer. Use the arrow keys to select an option from the list, and press enter to activate it. There is more information on the Select Synthesizer Dialog in the NVDA User Guide.
To adjust the options for the current synthesizer, open NVDA's speech settings. Press NVDA+control+v to open the speech settings directly, or open NVDA's settings dialog and select the "Speech" page. On this page, the speech rate, pitch and other options can be set. One option is to select the "Voice" used. Some synthesizers provide male and female options, or different regional dialects or accents. More information is available on Speech Settings in the NVDA User Guide.
The Synth Settings ring is a set of keystrokes to change voice options from anywhere. Press NVDA+control+arrows (Laptop: NVDA+shift+control+arrows) to use the synth settings ring. More information is available on the Synth Settings Ring in the NVDA User Guide.
NVDA also supports Microsoft Speech API version 5 (SAPI5) voices. These voices are also included with Windows from Windows XP through to Windows 10. There are also many other SAPI 5 voices available for purchase or download. To use a SAPI 5 voice, select "Microsoft Speech API Version 5" in the Synthesizer dialog. Set the specific SAPI 5 voice on other options from the speech settings.
There are many other synthesizers available, both free and commercial. This list of speech synthesizers has been created to help you find a voice that suits your needs. Each synthesizer in the list works with the Current Release of NVDA. The list below is separated into commercial and free offerings. At the bottom of the page is a section of "Legacy" synthesizers. These are no longer supported and only work with older versions of NVDA. The entries within each section are in alphabetical order
Commercial synthesizers are not free. These generally come with a trial period for evaluation. These are not sold or supported by NV Access. See the product page or contact the supplier for the current cost and terms of use.
Acapela TTS Voices for NVDA brings the quality of the Acapela Group voices to NVDA, in several languages. Acapela TTS voices for NVDA is a highly responsive speech synthesizer that provides a seamless navigation experience together with NVDA. Two type of voices are available, the High-Quality voices with a very natural and pleasant sound, and the Colibri voices with a slightly more robotic sound but highly performing and intelligible, particularly at higher speech rates. Acapela TTS voices for NVDA can be purchased online, for each sale a donation of 10 Euros is donated to NV Access to support the NVDA project. For more information, for downloading evaluation versions and for purchase, please visit the official website: www.acapela-nvda.com
CereProc offers a range of voices in many accents. We can create amazing new voices quickly due to our innovative voice creation system. Many of our voices are built exclusively for specific customers and applications. The samples on the CereProc site demonstrate CereProc's non-exclusive range of voices. For demos and to purchase, please visit the CereProc Voices page.
This add-on brings the popular Eloquence and Vocalizer Text-To-Speech synthesizers to NVDA, bundled as a single product. It can be used whether you have installed NVDA or are running it portably. With Eloquence, 10 languages are supported, and 45 languages are supported with Vocalizer. 10% of all sales are donated to NV Access to support the NVDA project.
For more information or to try or buy the product, please visit the official Eloquence and Vocalizer Expressive Add-on for NVDA product page.
This add-on brings the popular Eloquence and Vocalizer voices including Lekha and Sangita to NVDA, bundled as a single product. 10% of all sales will go towards supporting the development of the NVDA project. For more information or to buy the product, please visit www.saksham.org.
Infovox4 is a product based on the text-to-speech voices from Acapela-Group, available in more than 20 languages. It is shipped as a USB drive containing a copy of NVDA, pre-configured to use the included Acapela voices. It provides instantaneous access to any PC by just plugging in the USB, without need of local installation or administration rights. It also supports local installation on up to 3 computers. Two levels of voice quality are available in each language: high quality voices which are ideal for long reading, and compressed voices (called Colibri voices) to provide better performance when browsing text and menus at high reading speed. A donation to NVDA is granted for each sold unit of infovox4. For more information, evaluation versions and a list of distributors, please visit the official Infovox4 page.
Ivona™ voices may be purchased with TextAloud 4 or alone for use with SAPI5 speech software. They are available in over 20 languages with multiple voices for each language. Visit the official Next Up Ivona TTS page to listen to a demo of each voice, and purchase.
The Vocalizer range of voices from Nuance, which have proven to be popular on iPhones and the Mac, can now all be purchased for one affordable price for use with NVDA. Whether you use NVDA installed on one computer, or carry it around with you for access at anytime on a USB flash drive, these performant and high-quality voices will be there when you need them. Purchasing Vocalizer from Tiflotecnia or its resellers today gives you access to over 50 different voices covering more than 30 major languages.
For more information about Vocalizer with NVDA, trial downloads and a list of distributors, please visit the official Vocalizer NVDA website.
The Microsoft Speech Platform provides voices for many languages which are normally used in the development of server-based speech applications. These voices can also be used with NVDA.
To use these voices, you will need to install two components:
- Microsoft Speech Platform - Runtime (Version 11), x86: http://www.microsoft.com/download/en/details.aspx?id=27225 Note that you must install the x86 version even if your system is 64-bit, otherwise you will get a "Synthesizer Error - Could not load the mssp synthesizer" message when trying to select Microsoft Speech platform in the Synthesizer settings.
- Microsoft Speech Platform - Runtime Languages (Version 11): http://www.microsoft.com/download/en/details.aspx?id=27224 This page includes many files for both speech recognition and text-to- speech. Choose the files containing the TTS data for the desired languages/voices. For example, the file MSSpeech_TTS_en-US_ZiraPro.msi is a U.S. English voice. You don't need to install the MSSpeech_SR MSI files, as those are not voices, rather they are for speech recognition.
Mongolian Female TTS is a free Sapi5 speech synthesis for the Mongolian language by Innovation Development Centre for the Blind, Mongolia
NV Speech Player is a free and open-source speech synthesizer currently being developed by NV Access, that strives to provide a voice similar to Eloquence or Dectalk. This Klatt-based formant synthesizer is currently in the prototype stage, but, NV Access welcomes testing by the community, so that it can be further enhanced. NV Speech Player only speaks in English, but there are plans to extend it to other languages, once work on English is fully complete. You can read more about NV Speech Player, and download a copy, at: the NV Speech Player add-on page.
RHVoice is a speech synthesizer supporting English, Esperanto, Georgian, Russian languages.
RHVoice is a portable voices which can be installed in to your NVDA user configuration directory, meaning that it can be carried around with NVDA on a USB key or other storage device where ever you go. RHVoice will of course also work with an installed copy of NVDA.
The following voices are no longer supported and do not work with the current version of NVDA. The last known NVDA version each worked with is listed (where known).
A synthesizer which attempts to offer more natural sounding voices though slightly larger and less responsive than SVox Pico (listed below). This package provides two English and one Czech voices.
Download Festival for NVDA 2012.2 or higher
To install this synthesizer in to your currently running copy of NVDA, go to manage Add-ons found under Tools in the NVDA menu, press the Install... button and locate the downloaded nvda-addon file on your computer.
Newfon is a synthesizer by Sergey Shishmintzev which supports the Russian and Ukrainian languages.
To install this synthesizer in to your currently running copy of NVDA, go to manage Add-ons found under Tools in the NVDA menu, press the Install... button and locate the downloaded nvda-addon file on your computer.
Svox Pico is a rather small but human sounding synthesizer that supports English U.S., English U.K., Spanish, French, Italian, and German languages.
To install this synthesizer in to your currently running copy of NVDA, go to manage Add-ons found under Tools in the NVDA menu, press the Install... button and locate the downloaded nvda-addon file on your computer.
- FAQ
- Application Support
- Connect
- Guides
- Extra Voices
- Log Files And Crash Dumps
- Log Levels (move to userguide / delete?)
This section will be moved to the NVDA repository as a priority
- Internals
- Notes Adding support for aria attributes to browsers
- Using COM with NVDA and Microsoft Word