Facundo Lautaro Cornejo Acha (born August 28, 1998) is an Argentine composer based in Chile. He has written original music for short films, theatre, and audiobooks, blending acoustic and electronic elements with influences from folk, experimental ambient, and minimalism. His work includes musical arrangements for stage productions, collaborative compositions in interdisciplinary art projects, as well as music editing and production for narrative audio.

His recent credits include Three Rivers for a Fish – 迴游 and Fantasmas de Vidas Futuras by Antonia Monserrat and Ricardo Alfonso López, as well as Ladridos, a sound-based art project led by Nicolás Jaar and GRIETA, released on the label OTHER PEOPLE.