Jean-Christophe MARTI (born 1964). Autograph musical manuscript signed, Déméture sur déméture for 12 voices and string trio, 2003; 65 pages 34 x 27 cm in a titled folder. Piece for 12 voices premiered on August 13, 2003 in Conques by the Ensemble Musicatreize, under the direction of Roland Hayrabedian, as part of the cycle of creations " Les Tentations ". Lasting 30 minutes, it is based on six traditional texts of conjuration, preceded by a prelude (I) : II : " Sabatios "..., III " Mouchos, coruxtas "..., IV " Demeture on demeture "..., V " Sainte Apolline "..., VI " Averno de Satan "..., VII " Belle Lune "... The score is enamelled with abundant indications for the execution. The manuscript is carefully written in black pencil on 18-line paper. It is dedicated twice: "For Elaine and Charles-Henri, and for the child".