The sound archive consists of two collections: a so-called A-K collection and a general collection which is constantly growing. The oldest recordings of the A-K collection date from 1941.
The A-K collection consists of recordings made by Professor Erkki Ala-Könni. Ala-Könni was an eager collector of material and his work was not restricted to folk music. The recordings contain oral tradition from shipbuilding to fairytales and from popular beliefs to motorization.
Most of the material in the general collection was collected by students during their fieldwork courses. Especially in the years 1965-1980 "Ala-Könni's research groups" travelled around the country. The labour movement, association activities, municipal life, agriculture and traditions connected with festivals, children's games and amusements were among the most common research subjects.