Praised for their vitality and range of colors, Swedish-Norwegian string quartet Opus13 is one of Scandinavia’s most exciting ensembles. Formed in 2014, the quartet comprises Sonoko Miriam Welde, Edvard Erdal, Albin Uusijärvi and Daniel Thorell. They are 2nd prize winners of the prestigious Banff International String Quartet Competition 2022. In 2023 they received the Norwegian Equinor Classical Music Award, joining a list of previous winners including Leif Ove Andsnes, Lise Davidsen and Vilde Frang.

They have guested concert series and festivals such as the International Chamber Music Festival Utrecht in the Netherlands, Chamber Music Northwest in Oregon, East Neuk Festival in Scotland, Yeulmaru and Yonsei Chamber Music Festivals in South-Korea, Rusk Festival in Finland, and most of the major chamber music festivals in Norway, including Bergen International Festival, Stavanger, Rosendal, Trondheim and Risør Chamber Music Festivals.

Opus13 has collaborated with international top musicians such as Janine Jansen, Olli Mustonen, Julian Bliss, Alisa Weilerstein, Tabea Zimmermann, Jonathan Biss and Anne Sofie von Otter. They receive guidance and coaching from Bjørg Lewis and Berit Cardas of the Vertavo Quartet, and Tim Frederiksen.

The Opus13s are founders and artistic directors of Vinterspill på Lillehammer, a chamber music festival in the winter town of Lillehammer.