French jazz rock prog unit La Théorie Des Cordes firstly got started as a duo founded by Mathieu Torresand Stéphanie Artaud.

Although their lineup has been changed frequently, they've been playing with being much inspired by 70s British progressive rock, avant-garde progressive, Canterbury, hard rock or metal scene, based upon the Mathieu / Steph duo.

Their debut album "Premières Vibrations" was released in 2011 via Musea Records, "Singes Electriques" in 2013 with Musea records. After a break of a few years to develop other projects, they return as a collective, with a new album that explores improvisation on minimalist structure.

This third album 4U 9525 suggests other albums to come and other sound explorations for the future.