Composer Leevi Räsänen (b. 1997, Enonkoski) works with memories, affects, and the human experience. His works are inhabited by both unexpected, childlike playfulness and deliberately calculated microtones of emotion. Leevi is interested in iterative composing, in which he filters and transforms verbal and musical material through digital, physical, and memory-based processes, such as collage or photography. The idea of artworks as empathetic, supportive spaces for listeners to enter has grown central to his practice.​ Räsänen approaches composition with curiosity and playfulness. In his process-based work, the outcome is not fixed in advance; it stretches, reshapes, and fuses again and again as the process unfolds.

He is best known for his interest in microtonality within contemporary settings, especially music for strings, but also for his work in multidisciplinary groups, and for bringing non-musical phenomena into concert halls. He blends various equal divisions of the octave and natural tuning, combines acoustic sound with electronics, objects, and other parameters such as light and motion. Having studied at the Sibelius Academy and the Royal Conservatoire of Scotland, Räsänen has had his oeuvre of over 30 works performed across the Nordics, Scotland, South Korea, Spain, the United States, the Netherlands, and most recently Portugal. ​​

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His recent collaborators include, among others, Tapiola Sinfonietta who performed his 30-minute guitar concerto "Pisces – Mime" at the 79th Ung Nordisk Musik Festival in August 2025. The brass quintet of the Finnish Radio Symphony Orchestra commissioned his work for lighting and brass quintet "Light Flowers," which received its premiere at the Concert hall of the Helsinki Music Centre in February 2024. Leevi represented Finland at the Ung Nordisk Musik Festivals in Sweden 2019, Denmark 2021, Norway 2023 and Finland 2025. Räsänen was the guest composer for the 2024 Brinkhall soi festival in Turku, where his "Brain Shake" for Æstus Ensemble and orchestra Refugium Musicum, led by conductor József Hárs was premiered, with the four members of Æstus serving as soloists.  Räsänen's work is supported by the Kone Foundation. His work has also received support from organizations such as Arts Promotion Center Finland, the Paulo Foundation, Greta and William Lehtinen Foundation, and BNP Paribas.