Mr. Karlsson’s music has been performed at Carnegie Hall, Le Poisson Rouge, Lincoln Center, the Museum of Modern Art in NYC, at the Festspielhaus in Baden-Baden, The Paris Opera, The Oslo Opera House, the Royal Swedish Opera House, The Semperoper in Dresden, Le Poisson Rouge in NYC, The Ingmar Bergman Center at Fårö, The Joyce Theater, Brookyn Academy of Music, and at new music festivals and opera houses across the world. He has composed for the International Contemporary Ensemble, the American Contemporary Music Ensemble, Callie Day, Black Sun Productions, Lydia Lunch, Claire Chase, Joshua Rubin, Mivos Quartet, Sirius Quartet, The Dahlkvist Quartet, Niklas Brommare, Blythe Gaissert, John Kelly, Lennart Mårtensson, Abby Fischer and pop singers Lykke Li, Anna von Hausswolff and Mariam Wallentin. His first opera, The Echo Drift, premiered at the PROTOTYPE Festival in NYC in 2018. Mr. Karlsson’s enjoys an ongoing working relationship with celebrated choreographer and director Alexander Ekman. Since they first started working together, in 2012, the two have presented 9 stage works - among them “Play” (Paris Opera Ballet, 2018), “Tyll” (Royal Swedish Ballet, 2012; US premiere in 2015 by the Joffrey Ballet), “A Swan Lake” (Norwegian National Ballet, 2014), “Midsummer Night’s Dream” (Royal Swedish Ballet, 2015), “COW” (Dresden Semperoper, 2016) and “Rooms” (Norwegian National Ballet, 2017).