Jonathan Leurquin and Thomas Rossi are the composers of The Cosmonotes, a sound production company they created with Mickaël Choufane in 2014.

After studying at the conservatory and at the contemporary music school of Paris (ATLA), they created a band and collaborated with many artists.

Inspired by pop and atmospheric music, they developped a hybrid style with organic and electronic textures. Caught up by their passion for the image, they decided to combine both passion and composed for television and cinema.

Working the first years on commercials, they gradually opened up to fiction :

• Composition of the original music for the series “Nu”, produced by Olivier Fox (10x 22mn) broadcast on OCS, in 2018.
• Composition of the original music for the “H24” series, produced by Nicolas Herdt and Octave Raspail (7x52 mins) broadcast on TF1 in 2019.

Since 2018, they have composed many additional music for the cinema : "Les dents, pipi et au lit" (Emmanuel Gilibert) / "A story of love and desire" (Leyla Bouzid) / "Madeleine Collins" (Antoine Barraud) .

In 2022, they sign the score of "Darknet-Sur-Mer", directed by Rémy Four and Julien War (6x28mn) on Amazon Prime and release the soundtrack of the series on all streaming platforms.

In January 2023 they started a new collaboration with Thibault Férié ("A89 : Bordeaux-Lyon, les défis de la Transeuropéenne"), a director specializing in documentaries, as well as with Mathilde Bedouet, winner of the last Lagardère grant on an animated short film in rotoscoping technique ("Summer 96").