Mario Pfeifer's Approximation LP is a 12 inch vinyl record that was sold in conjunction with his 2019 exhibition at The Power Plant: If you end up with the story you started with, then you're not listening along the way.

Kamran Sadeghi, New York-based musician and member of the Soundwalk Collective, contributed the musical score for Mario Pfeifer’s video installation Approximation in the digital age for a humanity condemned to disappear (2014). For his digital compositions Sadeghi, in dialogue with Pfeifer, took the field recordings made by missionary and anthropologist Martin Gusinde in 1923 of Yaghan chants in Bahia Mejillones as point of departure and reference. The chants—one of which is digitally reproduced on the LP—are the only documents of their kind of the religious ceremonies and rites of the Yaghans, who have inhabited the southernmost parts of the world for more than 6,500 years and were, at that time, living on Shunuko, an island today known as Isla Navarino, in Tierra del Fuego. The original field recordings were made on wax cylinders, which are housed today at the Ethnological Museum of Berlin where they were digitalized.