Frederica Vieira Campos is a harpist and multidisciplinary artist from Porto, based at i o d o. She explores improvisation and experimental music using her electric harp and mixing console, incorporating the harp into collaborations and multidisciplinary projects, including dance, video, and community art. She curates the Fritarias cycle of concerts. She is a member of the duos URTIQA, The Energy of Rising/Falling, and Festa do Pijama.

Lizatron, a record collector and curator, is the driving force behind Invisible Sounds, a DJ/promoter/label/radio show founded in London and now based in Lisbon. She is a prominent figure on the Lisbon scene, not only as a DJ but also as an event promoter.
She plays at major venues as well as music bars (Lux, Outra Cena, ZDB, Passos Manuel, Vago) and has a longstanding relationship with the cult club Salon des Amateurs in Düsseldorf, where she has performed on numerous occasions. A resident at Fiasco in Porto, she also contributes to Mutant Radio with her quarterly podcast Invisible Sounds.