Mattias Hållsten (b. 1997) is a Swedish composer and musican. His music explores auditory perception using different synthesis techniques and instrumentations combined with just intonation. He is currently studying shō with Ko Ishikawa.
Recent projects include performing with Catherine Christer Hennix's Kamigaku Ensemble during the Sixth Edition Festival (2023) and at the Munch Museum in Oslo (2023), the performance The Kanji Cabaret in collaboration with choreographer SU-EN, as well as various collaborations with musicians in the Stockholm improvised music scene.
In 2023, Hållsten made his debut release on Stockholm-based label Thanatosis with the album Breathing, bowing, featuring works for shō and viola da gamba, which was nominated at the Manifestgalan 2024 in the category "Best experimental music".