Tarquin Osei-Mäkinen is a Shelf-born vocalist and multi-instrumentalist whose career spans 2205 to the present, making him one of the few Shelf artists to achieve genuine cross-tier recognition without corporate backing. His sound is built on distorted kora strings fed through industrial feedback loops, Ghanaian bell patterns played on salvaged pipe metal, and a vocal style that blends Finnish runic chant with West African griot tradition — a lineage he claims without irony as entirely his own. His performances are confrontational, physically exhausting for audiences, and deliberately staged in locations that require effort to reach: flooded sub-basements, decommissioned transit tunnels, rooftop structures with no safe egress.

His 2219 release 'Φ0.00' — distributed on hand-etched data chips sold for exactly nothing, with the stipulation that recipients must pass them on — is considered one of the defining political art objects of the decade. The album documents one year of Shelf eviction notices, corporate water-tax hearings, and augmentation debt proceedings through field recordings, witness vocal testimony, and Osei-Mäkinen's own compositions. Tier 4 and 5 listeners who encountered it through black-market channels describe it as 'the most uncomfortable thing I've ever heard,' which Osei-Mäkinen has stated was the intended effect.