324 Cashel Street was the former location of the RNZ Sound Archive, and latterly the location of the majority of Ngā Taonga's sound archiving operations. It was the site of the archive's largest audio storage vault, in which over 90,000 items were housed in controlled archival conditions. These included early audio cylinders, acetate discs, open reel tapes, cassette tapes and digital audio tapes. The branch also held publicity materials and documentation relating to the sound collection. Preservation, cataloguing and client supply activities took place, and there were also public listening facilities (by appointment only). 10-12 staff were based there in 2014. As part of the 2016/17 restructure Ngā Taonga Sound & Vision closed the facility in the first half of 2017, moving the collection to Avalon and remaining staff to Blackheath Place, Christchurch.