The Audio Recordings Archive (Suomen kielen nauhoitearkisto) holds over 23,000 hours of recordings collected since 1959, providing authentic samples of Finnish dialects, languages related to Finnish, and other world languages. The collection additionally includes samples of Finnish dialects spoken in Sweden, Norway, Ingria, the United States and Australia. Digitisation of the audio bank was undertaken in 1999. Over half of its content has been digitised, totalling about 13,000 hours of recordings.