Heidi Fast is an artist, singer, and an artistic doctoral researcher at the Aalto University School of Arts, Design and Architecture, Finland. Her artistic research examines the interconnections of the human voice and sensibility, and vocal art and psychiatry, through her practice based on the attuning tendency of voice. She works as an artistic researcher in the multidisciplinary research project `Experiential Demarcation: Multidisciplinary Inquires into the Affective Foundations of Interaction´ -project financed by the Kone Foundation and Academy of Finland. She was a visiting researcher in the `Artsequal´ research initiative financed by the Academy of Finland. Her artwork is focused on explorations with mutual non-verbal voice by the compositional means of sound art, contemporary music, and situation-specific live performances and concerts.