Olivier Casassus — composer
About

Composer
for film.

Composer and pianist in Marseille. I compose for documentaries, fiction, brand films and narrative podcasts.

Background
  1. 2000sConservatoire — clarinet and clarinet orchestra.
  2. 2022First documentary score: Aristide Maillol.
  3. 20235 documentary films, including Fernand Pouillon.
  4. 20248 documentaries, fiction films and commercials — Dom Pérignon, Melville–Delon.
  5. 2025Release of Jour bleu, first solo piano EP. 7 documentary and fiction films, including Rémy.
  6. 2026Documentaries for the Canal+ group — Marina Foïs, Les films inachevés.

I score documentaries broadcast on France Télévisions, Ciné+ and Museum TV, films produced with the Musée d’Orsay, short fiction and brand films. I live and work in Marseille, and I work across France and remotely.

The starting point is almost always the same: an upright piano, often prepared, recorded up close. Around it, synthesizers, a guitar, and strings when the film calls for them. I try to do as little as possible until the images ask for more.

In December 2025 I released Jour bleu, my first solo piano record, digitally and on 10-inch vinyl. It was reviewed by EARMILK, Backseat Mafia and Echo Room, and played on FIP.

Services
Original score, sound design, arrangements
Formats
52-minute films, documentary series, short films, brand films, podcasts
Studio
Marseille — prepared upright piano, orchestral writing and synthesizers, mixing at Sodasound Paris
Broadcasters
France Télévisions, Ciné+, Museum TV, Musée d’Orsay
Societies
Bleu Coda — music publishing, original scores, sound design & sonic branding · SACEM member
Reply
within 24 hours, in French or English

What I like to write

Three territories
01

Orchestral

Strings, flutes, harp: writing for an ensemble, to picture, when a film calls for breadth or a breath. Themes that return and transform rather than a wall of sound.

Heard in : La nouvelle école de Paris · André Brasilier · À un cheveu près

02

Piano and prepared piano

Where it all started. An upright piano, sometimes prepared, reversed or run through effects, for intimate music that knows how to step back behind a voice-over.

Heard in : John Singer Sargent · Manet–Degas · Aristide Maillol · Jour bleu

03

Electronic and synthesizers

DX7, Minimoog, Nord Lead, Korg: pads and pulses for films about the body, the machine or the city. Analog and FM, played by hand.

Heard in : Rémy 2024 · Hans Hartung · Reset · Dogs in Front of Alepa

Instruments played

What I record myself.

Contact

Let’s talk
about the film.

A project, a date, a link to a cut. I reply within 24 hours.

oc@oliviercasassus.com

Marseille · available in France and remotely

Write

The film, the delivery date, a link to a cut if you have one. The rest, we’ll talk about.

I reply within 24 hours.

Or directly : oc@oliviercasassus.com