It subsequently became the only station to continue broadcasting in the Slovenian language during the occupation of Slovenia in World War II, despite orders to the contrary. After the war, radio developed in popularity in Slovenia, with a test stereo broadcast taking place in 1965. In the early 1990s, when Slovenia was struggling for independence, radio again played an important role. Digitalisation (DALET) was introduced from 1998.
Radio Slovenia comprises the following editorial units: music programmes, originally-produced programmes, Slovenes in the world, documentary programmes, educational programmes, children and youth programmes, morning and night programmes, and classical music programmes. Arts and culture programmes are provided by all three channels, which offer information and news on the latest events on the domestic and European cultural scene. Original radio drama productions for adults and children, as well as short and amusing docudramas, literary evenings, and nocturnes also feature in the schedules.
According to Mediana RM, Slovenia's most listened-to national public radio stations in 2020 (July 2020) were the Radio Slovenia First Channel (RA SLO1) with a 9.3 per cent audience share, followed by the Radio Slovenia Second Channel - VAL202 with a 13,7 per cent audience share which is also the most listened-to radio station in Slovenia.
RTV Slovenia encompasses several studios where the national radio programmes are recorded and performed live. Radio Slovenia also runs two regional radio stations: Radio Koper-Capodistria, which airs programmes for the Italian minority, and Radio Maribor, which air programmes for the Hungarian minority as well as Radio Slovenia's international service Radio Si.
Radio Slovenia participates in the activities and exchanges of the European Broadcasting Union (EBU). Within the Millennium European Radio Days programme an online electronic encyclopaedia was created in Slovenian, English and Italian languages, featuring a short history of Radio Slovenia.