Marja Ahti (b. 1981, Luleå) is a Swedish-Finnish sound artist based in Turku, Finland, working in composition, installation and cross-disciplinary performance. Working with field recordings, feedback, analog synthesis, digital processing and acoustic instrumentation she investigates the borderland where sounds mirror each other and communicate. She creates precise musical narratives with slowly mutating textures of detailed acoustic sound and intuitively tuned sustained tones and shapes.

Ahti's latest solo album Tender Membranes was released by Black Truffle in 2023. She has presented her music in many different contexts around Europe, in Japan and the United States, notably at The Long Now, Sonic Acts, Présences Électronique, Lampo and Edition Festival. Alongside her solo work, she is also active in the duo Ahti & Ahti with her partner Niko-Matti Ahti, in the artist/organizer collective Himera and in current collaborative projects with Judith Hamann, John McCowen, Manja Ristić and Mikko Kuorinki.