Arthur Nyqvist, known better as Woesum, is an experimental club producer, DJ, and audio engineer from Stockholm, Sweden.

Woesum is a close associate of Drain Gang and Sad Boys, producing and co-producing many tracks for the two groups. His 2021 debut album, Blue Summer, features their members predominantly.

Since 2018, Woesum has regularly produced for Yayoyanoh, who also features on several songs from Blue Summer.