Frederik Øland, Rune Tonsgaard Sørensen, Asbjørn Nørgaard, and Fredrik Schøyen Sjölin – known collectively as the Danish String Quartet – have described their ensemble with these words: “Yes, playing string quartets is our job, and yes it is hard work, but we mostly do it for pleasure, like we always did.” Sometimes, of course, they revel in quintets, too, as we can hear in this 2017 Impromptu collaboration with Finnish pianist Juho Pohjonen.