Koop is a Swedish electronic music duo formed in 1997, known for their unique blend of downtempo, jazz, and pop influences. The group consists of musicians Oscar Simonsson and Magnus Rognan, who create a distinctive sound characterized by smooth melodies, lush instrumentation, and soothing vocals. Their music often features samples from various genres, contributing to a rich auditory experience. The duo gained popularity with their debut album, Waltz for Koop, released in 2001, which showcased their innovative style. They have since released several albums and collaborated with various artists, further establishing their presence in the electronic music scene.