2009: The CALST project started on 1 August 2009. The project was based on VILLE, an engine originally developed for Swedish at the Centre for Speech Technology (CTT) at the KTH Royal Institute of Technology in Stockholm, Sweden, by Preben Wik. Preben Wik was involved in the start of the project as part of the «think tank» and technical developer.

2013: The first version of CALST was launched by NTNU, Trondheim, on January 1. It was a downloadable version of the platform and contained vocabulary exercises for Norwegian and exercises for learning difficult Norwegian sounds based on the learner’s native language.

2015: The first web-based version appeared on January 1.

In April, a collaborative project to develop English contents was funded by the University of Agder (Allison Wetterlin, with Jacques Koreman).

A proposal for a Ph.D. project in NTNU’s Enabling Technologies initiative was granted. The doctoral candidate will apply feature-based automatic speech recognition (ASR) to automatic pronunciation evaluation. The proposal was written by Torbjørn Svendsen (IET) and Jacques Koreman (ISL). The project results can be used for automatic pronunciation evaluation in CALST.

On 1 July 2015, the exercises were extended with sound cluster exercises and a user logging was made implemented.

2017: In June 2017, the spin-off company Sounds Good was founded.

In October 2017, a new version of CALST, with a more user-friendly user interface, was launched.

CALST - Welcome page

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Project members