Björk presents a strings version of her highly-acclaimed eighth studio studio album Vulnicura, officially titled Vulnicura Strings. The original version of Vulnicura layered the boom and crack of electronic beats with an intense vocal melody and incredible string arrangements by Björk which have been performed live with a fifteen chair orchestra. The new version is musically wholly comprised of strings, with new violin solos by Una Sveinbjarnardóttir and strings recorded by a Viola Organista. Björk used the only Viola Organista in the world to perform some of the arrangements; an instrument which was designed originally by Leonardo Da Vinci but not built until after his lifetime. The instrument uses a friction belt to vibrate individual strings (similar to a violin), with the strings selected by pressing keys on the keyboard (similar to an organ). The instrument was recorded in Krakow, Poland by it's constructor Sławomir Zubrzycki and here is where the album reached completion.