— Stephan Mathieu, a musician

A live document of a site specific piece by Ensemble 0 created in July 2011 at Fundação de Serralves, Porto.

For this incarnation 0 were

Sylvain Chauveau. guitar, glockenspiel
Stéphane Garin. percussion
Stephan Mathieu. Phonoharp, virginals, processing

The piece comprises a soundbed composed from field recordings by Garin and Chauveau, and a score for live instruments and computer processing. The composition was diffused through a 10-channel array of various loudspeakers surrounding the audience and players, the audience was also located on stage. Untitled was augmented by a simple choreography for 8 suspended light bulbs.
Sylvain, Stéphane and I are currently working on a studio version of this piece.

Please contact me in case you are interested in discussing possebilities for a live performance with us.

Performed at Fundação de Serralves, Porto, Portugal on July 21. 2011
Video recording and editing by Papagaio Loiro
Curated by Pedro Rocha

Very special thanks to Charles Mugel for hosting the video for us!


The GRM in Paris has commissioned me to write a piece for gramophones for their Showcase at La Gaîté Lyrique on November 12.

I wrote a string quartet based on binairy code, to be performed by four mechanical-acoustic gramophones. Individual voices, played and recorded by myself using a treble-, alto- and tenor-viol as well as a da gamba, where cut in 32 fragments onto four 78RPM dubplates to be played back ad lib, creating a constantly changing stream of strings. The concept for Untitled String Quartet is based on an unfinished oratorio for phonographs, gramophones and live processing I’d been working on between 2006 and ‘08. During the performance on the GRMs classic Acousmonium, a 30-channel setup for this occasion, I have sent the gramophones through a computer for spectral processing, this signal was then mixed with the acoustic strings again and diffused in the space.

Here is a short excerpt from the unprocessed gramophone quartet, played back on four HMV 102 portables.

Untitled String Quartet (excerpt)

The photo was taken during the ‘meet-the-instruments’ workshop on Sunday, November 13.



Este viernes 11 a las 20.30
queremos invitarlos
a un refugio de sonido y color


Una instalación creada
por Cabina & Stephan Mathieu
para el festival Panoramica

Espacio Fundación Telefónica
Arenales 1540
Buenos Aires

Entrada Libre y gratuita




I have created a dedicated page for Constellations with a project introduction, a new video and booking infos.
Please click to visit.