"Lionel Marchetti is a composer of concrete music. First self-taught, he then explores the repertoire of concrete music, as acousmatic art, with the composer Xavier Garcia 1 from 1989 at COREAM (Collective for electroacoustic research and musical action) in Fontaine ( Isère ). He then composed in the studios of the Musical Research Group in Paris, of the Living Music Group of Lyon, of La Muse en circuit in Alfortville, of Césaré in Reims, of Gmem inNational center for musical creation in Marseille, at the training center for intervening musicians (CFMI) in Lyon and in his personal studio. At the same time, Lionel Marchetti pursues a work of poetic writing 2, 3, as well as a theoretical approach to concrete music and the art of the loudspeaker, as a practicing artist of the genre.

His book La musique concrète by Michel Chion 4 remains the most noticed - as well as his essay Speaker, voice and mirror... - technical essay in the form of a letter 5.

Its catalog is currently rich with more than a hundred concrete works.

Since 1990, he has been a lecturer in the art of concrete music and electroacoustic techniques at CFMI Lyon at the University of Lyon 2 (see BNF authority notice)."

"Jean-Baptiste Lacou: trombonist. He began his musical studies at the Conservatory of Orleans where he obtained his DEM trombone in 2007 before joining the CNSMD Lyon in 2008. He received his Master's degree of musician performer in 2012. His strong taste for creation led him to specialize in contemporary music. He then worked with artists such as Pierre Boulez, Benny Sluchin and Peter Robinson. It is this same attraction for the new techniques that makes him cross the road of the Soundpainting in 2008 with the collective Orléanais "Paint Atonik". His meeting with Walter Thompson in 2009 led him to explore this mode of composition in real time in the most diverse forms, from trio to formations of more than 10 musicians, direction and trombone. He has also been invited since 2010 from the "Think Tank" (world meeting of Soudpainters) to contribute to the advancement of language.

At the same time, following his studies of classical music, he regularly collaborates with the French national orchestras (National Orchestra of Lyon, National Orchestra of Lorraine, Monte Carlo Philharmonic Orchestra, National Opera of Lyon, ...) Jazz as well as electronic music are also an integral part of his influences: he performs several times at the Orleans Jazz Festival and is currently working on a hybrid jazz-electro project aimed at making electronic music more lively on stage. All these experiences make Jean-Baptiste LACOU a complete and comfortable musician in the complex and volatile sound of SPANG! with which he has been working since 2012."