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Eyra provides tools for data gathering designed to be used to make speech corpora for under-resourced languages.

The team at Reykjavik University published an article on this software for the SLTU 2016 conference, which can be found online and in this repository at Docs/Petursson_et_al_2016.pdf.


Currently, the Eyra backend has to be run on Linux. Systems we've used are mainly Debian 8 and to a lesser degree, Ubuntu 14.04 and 16.04.

The recording devices themselves (phones, laptops, anything with a compatible browser) can use Chrome or Firefox. However, when using phones, we recommend using our Android app (located in AndroidApp). It bypasses a nasty bug we discovered where audio recorded through a phone's browser is 48kHz, but the data in it appears to be limited to 16kHz.

If you want Quality Control (QC) to work, you need to install Kaldi and more, look at how to set it up in

Laptop installation (local wifi)

Setup a laptop which the phones (recording devices) can connect to in an offline setting.

  • Backend (on the laptop)
    You have to initially have an internet connection and run
    ./Setup/ --all and then
    sudo service apache2 restart

    Warning: Running ./Setup/ --all or ./Setup/ --ap disables your wifi while setting up the access point. If this is not what you want, a way to enable the wifi is the following:

    • sudo nano /etc/NetworkManager/NetworkManager.conf -> change managed=false to managed=true
    • sudo service network-manager restart

    Wifi should now work again.

  • Client-side (on the devices)

    Optionally, you can go to Settings->Set instructor if you want to link this device to a certain field worker/instructor.

Internet installation (e.g. for crowdsourcing)

Setup a server (we use apache).

  • Backend
    Run ./Setup/ --all --no-ap and then
    sudo service apache2 restart

    You might want to look at Setup/src/apache/tmpl/etc_apache2_sites-available_datatool.conf (src) or /etc/apache2/sites-enabled/datool.conf (generated) and e.g. adjust the parameters for the mpm_worker_module.

    The laptop setup uses a self-signed certificate (which needs to be manually put on and installed on the phones), but the internet one should use a real certificate (this depends on which certificate used). We used letsencrypt for a free certificate. This has to be done manually.

    This should work on both Debian 8 Jessie and Ubuntu Server 14.04.

  • Client-side
    Same as the laptop installation, except, no need to manually install the certificates and of course the link to your server depends on where you host it (you might need to change this in the Android app code (see for details)).


Eyra is not perfect software. You can look at issues on github (e.g. with label bugs) for example. If you do fix something please contribute!

Basic usage:

In the GUI

  1. Hit begin
  2. Type your username (anything)
  3. Enter your info (gender, etc.)
  4. Hit Rec to start recording and display a prompt
  5. [optional] Hit Skip to skip this prompt and immediately start the next one
  6. Hit Stop when you have read the prompt

See Docs/UserGuideInstructions.pdf. An example instructions on recording offline can be found at Docs/DataUploadingInstructions.pdf.

If you require your users to give consent for their recordings to be used, you can look at an example participant agreement used at RU at Docs/EXAMPLE_PARTICIPANTAGREEMENT.pdf. This is only an example, and you should have your lawyers look over your own agreement.

More details about the software and its usage can be found in


See A list of contributors with contact info can be found in the CONTRIBUTORS file.


This project wouldn't have been possible without the cooperation of

  • Google

Project head:

  • Jón Guðnason

Original developers at Reykjavik University:

  • Matthías Pétursson
  • Róbert Kjaran
  • Simon Klüpfel
  • Sveinn Ernstsson

Many thanks to the people at Google:

  • Oddur Kjartansson
  • Linne Ha
  • Martin Jansche
  • and more

Additional developers

  • Judy Fong
  • Stefán Gunnlaugur Jónsson

Technical Writer

  • Judy Fong


This software is licenced under the Apache Version 2.0 licence as stated in the LICENCE document. Some parts of the software are licenced under the MIT licence or other open licences. A non-exhaustive list can be found in the NOTICE document.