Hildur Gudnadóttir, who won the best score Oscar for 2019’s ‘Joker,’ returned for the follow-up film that sought to expand the “vocabulary of the string instruments” from the first film.

1. Guqin The guqin is a Chinese zither, a plucked instrument 120cm-130cm (47 inch-51 inch) long with seven strings. It is one of the oldest instruments in China, dating back 3,000 years.