Modes de jeu
The modes de jeu are specific musical techniques developed to enrich the timbre capabilities of musical instruments. Used in contemporary classical music, the first composers to have used them as such are certainly Béla Bartók, Richard Strauss, who asked the horn player to sing in his instrument, Henry Cowell and his clusters, and Edgar Varèse, who in Density 21.5 ordered the flutist to hit the keys.
