The new alto saxophone marks a huge step forward for saxophone design. Offering players a wealth of new musical possibilities, the new Custom EX has been designed in collaboration with some of the world’s most talented saxophonists, including Nobuya SugaThe new Premier YAS-875EXII Custom EX alto saxophone marks a huge step forward for saxophone design. Offering players a wealth of new musical possibilities, the new Custom EX has been designed in collaboration with some of the world’s most talented saxophonists, including Nobuya Sugawa, Jean-Yves Fourmeau and Otis Murphy. Their invaluable input has meant that Yamaha have been able to create an instrument that sounds great, is comfortable to play, and that constantly evolves with the player.wa, Jean-Yves Fourmeau and Otis Murphy. Their invaluable input has meant that Yamaha have been able to create an instrument that sounds great, is comfortable to play, and that constantly evolves with the player