The main part of the audiovisual documents (records, tapes, cassettes and videos) are entrusted to the Swiss National Sound Archives in Lugano. However, the NL has retained in its Special Collections and in the Swiss Literary Archives, cassettes accompanying specialised journals (published in German, French and Italian) of the Swiss Federation for the blind as well as the talking books from the Swiss Library for the Blind..
Also the sound storage mediums, that are part of the music fonds, are futher held by the Swiss Literary Archives (SLA). Excepting the record collections of Albert Nef and Rudolf van Leyden.
The access to the sound storage mediums is granted in the reading room of the SLA.