The music of LOOS cannot be defined in terms of a single category or genre.
LOOS places itself in the no-man's land between composition and improvisation.
These two elements influence each other continuously, creating a tension both among the musicians and between the musicians and the public. What the audience in fact witnesses at each concert, is the genesis of a composition, from within the given structures of the composed units. Their individuality guarantees the continuous flux of polyphonic music they envisage. Their common experience ensures it works. Founder Peter van Bergen is primarily involved in contemporary and improvised music, while Gerard Bouwhuis, Huib Emmer, Paul Koek and Patricio Wang are mainly concerned with twentieth-century composed music.